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Often spouting dialogue about love and justice, this character is naive and lacks common sense; her determination is usually the only thing keeping her from being completely incompetent (even if she is potentially very powerful). She can also act a little hypocritical, being as sneaky or outright violent as the wickedness she supposedly fights.
How satirically this character is portrayed depends on the mood and personality of the lead, although writers design her to be somewhat sympathetic. Nonetheless, it is difficult for the other characters to really dislike her, because she is honestly nice and a loyal friend.
Somewhat like the All-Loving Hero, but not as charismatic or as effective, placing this character in a supporting role 99 percent of the time. May admire the Knight Templar at first and continue to do so if the Templar is not portrayed negatively.
See also The Pollyanna, Naďve Everygirl, Stupid Good. Occasionally has problems if they're forced to be a Reluctant Warrior.
Not to be confused with the other type of Love Freak.
Princess Amelia in The Slayers is probably the best example from that series.
With her father, Prince Phil, being an even more over-the-top gender-flipped version.
Might Guy of Naruto is perpetually ranting about love and springtime and passionate, flaming youth (In a completely non-sexual way, believe it or not), and is eagerly imitated by his star pupil, Rock Lee — this bizarre behavior leads some to believe that a sort of Zeus-Ganymede dynamic exists between the two, but this is merely conjecture. He even persuades said student to undergo a risky operation by promising to 'follow' him if he doesn't survive. Then they tearfully embrace.
Winner Sinclair from Karin is a spoof, often rattling off words that make no sense in Japanese (he's Romanian) but have something to do with love or determination or whatnot. Nobody takes him seriously. The kicker is, the Knight Templar's his grandfather.
Usagi Tsukino, of Sailor Moon fame, has the exact personality traits described above, although most people tend to see her in a simple Magical Girl Warrior role, or from a Messiah mold, as the series flat-out names her the Messiah.
Aino Minako, or Sailor Venus, would be another obvious choice - going on about love as much as Sailor Moon, because she's aware she's an incarnation of the goddess Venus/Aphrodite or at least connected to her. She tries to play this up but fails at it as her being unlucky in love despite this is a recuring theme throughout her manga, Codename: Sailor V.
Akari from ARIA fits this trope like a single glove, though the entire show itself could also be argued to qualify.
El in Shugo Chara! is a prime example, making speeches about love whenever she possibly can.
Albert from Gankutsuou becomes this somewhat, after getting convinced that what matters most for people to marry for is love. Initially, it was Maximilien who thought this way more, but he later became more understanding after hearing Franz tell him that marrying the one you love isn't always the way to bring them happiness. So instead, Albert becomes the one more obsessed with it than Maximilien. Because of his fixation on the idea of true love, he starts questioning his own Arranged Marriage with Eugenie, and frequently talks about how he wishes to truly experience love...
Duck/Ahiru from Princess Tutu — even more so (if such a thing is possible) when she's in Tutu form. More importantly, she's much more eloquent and persuasive about it.
Sherry from Fairy Tail. While not the standard (she was initially a villain), her first appearance consists of her simply talking about love.
Sherry: We'll throw them into eternal darkness. In other words... love.
Sherry: Reitei sama will never love me now!
Her cousin Chelia, in the timeskip, shares the same sentiment.
Fran Madaraki of Franken Fran is a self-described "lover of love" and frequently performs procedures that she believes will bring couples together. Although she's far from incompetent— she may be the second best surgeon in the world, after her creator— she's extremely naive and her medical ethics are questionable at the very best.
Elmer C. Albatross of Baccano! is a hardcore example, to the point where his behavior often stops being annoying and becomes seriously disturbing (such as when he cheerfully encouraged a young girl to smile after her fiancee was murdered right in front of her). This is probably because he doesn't see any inherent meaning or morality in the world, so instead he just wants everyone to be happy.
In The World God Only Knows, Keima Katsuragi always blabbers about love... in games. He's rather detached from reality (to say the least), but he's anything but incompetent.
In "Magician's Academy" specifically episode 5 introduces Hapshiel who loves everyone and wants to share this. Seeing as he's invincible as well as dense as a plank and a bisexual masochist he doesn't really know how to stop loving people.
Yuuri from Kyou Kara Maou, who becomes king of the Demons and sets out to end thousands of years of racism by reaching out the Humans with compassion and never distrusting anyone, ever. Because he has such goodsupport, it works. Mostly.
America from Axis Powers Hetalia is a good candidate for this - though he's mostly got a hero complex. He does mention getting back Lithuania and Poland together for justice in a pretty famous comic strip in which America and Lithuania are lying in bed and talking about the men in their lives, and anyway - a 'hero' complex has everything to do with love and justice. Though does preaching that they'll save love and justice count?
Riruka Dokugamine from Bleach is something of an example, as she proclaims her Fullbring ability to be The Power of Love. Her power is supposedly compatible with anything she loves (which are mostly stuffed animals and other cute girly things). She's also the Token Good Teammate among the Fullbringers. However, she has some tsundere tendencies that prevent her from being a complete example.
Miss Crangela from LetDai is quite a realistic example.
Kazehana, from Sekirei, is somewhat of a more mature example. While she starts out as a Broken Bird nursing a broken heart, and becomes the Cool Big Sis of the group.....she's also prone to interrupting serious moments by squealing about how wonderful ~love~ is. Musubi and Yume play it more straight, giving speeches about The Power of Love. Of course, since love is the source of a Sekirei's true power, this makes them somewhat Genre Savvy.
President Lory Takarada of Skip Beat! is in love with love. He likes to spread and preach about the wonders of love whenever he can and believes in it more than anything else in the world. He's so infamous for his dedication to love and romance that everybody in his company is well aware of it.
Stomped into the dirt and ground under Junji Ito's heel in the story Army Of One. The titular group preaches that everyone is friends and should join hearts and love each other... by killing people and sewing them together in increasingly and creatively brutal fashions. Turns out it's Natsuko somehow doing it all by herself.
Radio: Gather round, people! All together now! Nobody likes a lonely only! Everyone's your friend, everyone's your friend, when you join hearts and sing - Army of One, we're an Army of One! Everybody join hands now, everybody join hearts now, Army of Oooooone!!
Bojiggler from Bobobo-boBo-bobo takes this trope to its logical extreme—one minute he's preaching about love and peace and how much he hates hurting people; the next he's beating or blasting the everloving shit out of people for no reason at all!
The main character in Invisible Man is a good example of what happens when one of these people actually gets followers (most of whom are absolutely desperate for someone to guide them out of the hell they're living in.) It doesn't go well, but only because he's also a Horrible Judge of Character and an Unwitting Pawn.
In Scrubs, psychiatrist MollyClock believed that love and happiness motivated everybody on some level, and resident bastards Dr. Cox and Kelso couldn't convince her that "People are bastard coated bastards with bastard filling." They try to break her spirit by being mean to her, though when she fakes being upset they feel bad about it and prove to her that what she said about people being good on the inside was right.
Hope from Urinetown, whose insistence on "following your heart" ends up squandering the water supply and killing most of the city of thirst; it's implied she ends up dead at the survivors' hands. Moral of the story: Don't put the Love Freak in charge.
So much of a love freak, that she can't so much as jump in battle without saying the word in some of the games.
She is contrasted with two of the series' Archangels, to show how much more she gets the whole "Power of Love" thing than them; Vulcanus pays lip service to the concept but is actually a hateful bigot, and while Virunga is kinder, legitimately well intentioned, and even tries to claim his actions in the name of "Love", but he doesn't realize that taking Sicily back to Celestia is Cruel Mercy and she is actually happier in the Netherworld. Flonne is such a pure example of this trope that she eventually becomes a Archangel herself.
Kim Kaphwan of the Fatal Fury series has made it his life's goal to eliminate evil and stand for justice and truth... as well as strong-arming criminals into his "reformatory" program of intensive trainingnote his reformation of Chang Koehan and Choi Bounge led to the formation of Team Korea in the King of Fighters series. Later on in the series, he seems to gain the ability to Detect Evil, as his eyes glow yellow whenever he meets up with an evil character. Indeed, fans often use Kim's "evil sense" as a way to determine whether or not a character is truly a villain. His son Jae Hoon also follows suit, and sometimes labels someone overconfident but not completely evil like Gato... EVIL!
Tizoc/The Griffon is a Justice Freak who is not from the Kim family. Justified, because he is somewhat of an idol to children and has to uphold the "hero of justice" persona for their sake. Like Kim, he also has a special intro against evil people.
In Samurai Warriors, conversely, Azai Nagamasa gets the Love Freak treatment (since his tragic relationship with Oichi is one of his defining traits in Japanese depictions), but shares the Honor Freak and Justice Freak roles with Naoe Kanetsugu. (Interestingly, her Story tweaks their tragic parting by having it come before a final, full-fledged battle, so instead of merely having an unwilling Oichi returned to her brother before the castle's fall as is the popular depiction, she starts the battle on Nobunaga's side and due to gameplay she lands the killing blow. In Mitsuhide's story mode, however, he surrenders and after a verbal barb by Nobunaga he kills himself with Mitsuhide's sword.)
And of course, Koei's poster boy for Justice Freak is actually Ma Chao. He can't go two or three sentences without using the word 'justice'. The people from Wu mock him for it.
As of Number seven, Shu itself is pretty much "Benevolence Freak, the Kingdom". Seriously.
In World Heroes, Rasputin is a flamboyant old man with fruity poses, and sometimes very big hands or feet, but never stops spewing the virtues of love. He is most famous for his super move Garden of Love where he... drags the enemy to the ground through a garden of flowers, with his face implanted on it, and there are some... suggestive things happening. All we can trust is those heart signs coming out of it. Squick.
To be fair, the Keyblade and general metaphysics of the game world seem to agree with him.
And anyone who disagrees will probably get a skyscraper thrown into their face.
Aqua from Birth By Sleep is almost as bad as Sora when it comes to friendship speeches and philosophies. But, even moreso than Sora, it's best not to disagree with her. Ven also qualifies: whenever he's not fighting the Unversed or running after the friends he already has, he sums up his goal as "just trying to make friends".
Deconstructed in .hack//G.U. in the form of Atoli. Her Love Freak attributes drive her to be close to an anti-PVP guild (where PVP is Serious Business in the game). She is so much of a Love Freak Haseo basically went nuts. What nobody knows is that this is motivated by her complete lack of self-esteem which pushes her to do "good" stuff to gain acceptance. To twist the knife further, her most trusted friend/mentor Sakaki is actually manipulating her, milking her trust in him and her powers of the Second Epitaph, Innis. Oh, and did we mention she met him on a suicide website?
While she does not preach to others, the ever-cheerful Milfie from Galaxy Angel loves pretty much everyone. This also makes her the easiest to perform well in battle and the Lucky Star is already generally better than the other ships to begin well.
Cynthia, the eccentric weapon shop owner from Ar Tonelico 2. She very frequently brings up her loving relationship with the protagonist (hint: only she thinks there is one) and insists that weapons be forged with massive amounts of love.
Komari from Little Busters!', a Cutie who strongly believes that you should always remain positive, that the world is filled with amazing and happy things, and that by making someone else happy you become happy which makes them even happier, causing a spiral of happiness for everyone. A less traditional example is Kyousuke, who often spouts (and genuinely believes) the sort of morals that would be cheesy even in kids' cartoons and is invariably highly touched by Komari's statements, to an extent that surprises even her.
Nagito Komaeda, AKA Super High School Level Good Luck from Super Dangan Ronpa 2 is a very dark example, always talking at length about the power of hope over despair, and idolizing the Super High School Level students trapped on the island. He's also very much insane and attempted to commit the first murder (though he ultimately failed) in order to kickstart the game and witness the cast triumph over adversity. Afterwards, he tries to get other students to collaborate with him on the next murder in order to make the investigation more exciting (he doesn't even care if he dies, as long as he can bring the students to the brink of despair, only for them to pull themselves back out.)
Subversion: Grace from El Goonish Shive gives a Love Freaky speech, before it is revealed she was reading it from a book.
Gamzee from Homestuck counts as one, given his chill attitude and friendly nature. This is notable because his entire species is typically very violent and murderous, while he is the exact opposite. Until he goes sober, that is...
Nepeta also counts, in that she's a shipping obsessed troll who even has a large shipping diagrams for the four quadrants of troll romance. Her dancestor, that is to say, her ancestor's alternate-universe incarnation Meulin is Nepeta taken Up to Eleven, mimicking her flanderization from some of the fanbase.
Aphrodite being the goddess of lust and passion is this in MYth. Since she's concious that passion can't be archive withouth love and viseversa, she's getting her nose into other people's love lifes and it's determinated that Hades and Persephone consume their relationship. Ironically, Eros who's in charge of making people to fall in love, is more down to earth than her and often acts as her Cloudcuckoolander's Minder.
Orn "Dutchy" Ayers of Survival of the Fittest v4. At one point, he makes a speech to the cameras that he and his friends will prevail over Danya and the game due to The Power of Friendship, saying that friendship will always win over evil. Worth noting, though, is during this speech he is showing the camera (which is broadcasting to live television) the island's map, in an attempt to help any rescuers find where they are. He's also portrayed a lot more sympathetically than most.
Optimus Prime started out like this in Transformers Animated with his "we're all just cogs in the Autobot machine" speech. He got over it very, very quickly around the time they got attacked by Megatron.
The Care Bears are the embodiment of this trope, though Love-A-Lot Bear shows this the most.
In the play within a play, The Boy in the Iceberg, in Avatar: The Last Airbender, Katara (a young, teenage Mama Bear, water-bending, Bad Ass) is portrayed as something like this - an overly emotional "hope"-freak who can't go five minutes without launching into an inspirational speech about the value and power of hope (with tears in her eyes). The portrayal strikes a little close to home but nobody in the group wants to say anything (the real Katara's temper is not to be messed with).
In an odd example, King Gorilla originally wasn't going to help The Monarch break out of prison. But when The Monarch mentioned Dr. Girlfriend, he changed his mind because he did not want to stand in the way of love.