The Protagonist of the series, Rin Tsuchimi started off with only Kaede Fuyou around, until the plot ball got rolling with the arrival of Lisianthus Eustoma and Nerine Forbessi.Tropes associated with Rin:
The daughter of the King of the Gods, Lisianthus, or Sia for short, met Rin when she was eight years old in the human world, having wandered away from her father's business meeting out of boredom. Rin befriends her on that day, causing Sia to fall in love with him.Tropes associated with Sia:
The daughter of the King of the Demons, Nerine also met Rin in the past, and fell in love with him due to his kindness.Tropes associated with Nerine:
Badass Princess - Possesses remarkable magical power, which she uses to punish anyone who wrongs the man she loves.
Body Snatcher - Non-villainous example: In the conclusion of the Nerine/Primula arc, to save Primula, Lycoris takes over her body and calms Primula, whose magic was spiraling out of control, down. Her eye color changes from brown to purple to indicate the change, as well as her calling Rin "Rin-kun", as opposed to Nerine usually calling Rin "Rin-sama".
French Maid Outfit - Nerine dresses up as a maid when she helps Rin move into his new apartment.
Funbag Airbag - Rin crashes into Nerine at one time. Her reaction is to hold him there for a while.
Gainaxing - In the OVA, when Sia's dad replaces the water in the pool with eels.
Image Song - Pray and Hitori Janai yo, a duet with Sia.
Informed Ability - Nerine is said to be an astounding singer, but when we hear her sing, she sounds like any other VA worth their singing talent (for example, Yuko Goto, Kaede's seiyuu, is quite the singer in real life). It's revealed that her singing talent also came from Lycoris.
A young girl that Rin meets in the town's arcade, Primula is extremely attached to Rin and follows him home, after saying "I've found you Rin." She always carries a stuffed cat around with her, and gets distressed when it gets worn out. Primula is the third test subject of the Yggdrasil Project, a homunculus created for the sole purpose of being experimented upon. She was friends with Lycoris when she was younger, and almost prematurely reveals Lycoris' existence to Rin when they met. She corrects herself midsentence, instead asking Rin if he knows Nerine.Tropes associated with Primula:
Chekhov's Gun - Singular episode example: When Kaede got sick early on, one could only wonder what Primula was doing in her room with a bag of seeds and a grindstone. Turns out she was making medicine for Kaede.
Emotionless Girl - Part of her Character Development is gaining emotions, which is a plot point of her arc:Her gaining emotions caused her powers to spiral out of control, but she got better.
Sugar and Ice Personality - The emotions were always there, deep down; she just never had anyone to bring them out because nobody except for Lycoris, who died shortly after has ever bothered to treat her like a person instead of an experiment.
Instant Fanclub - In the graphic novel, the moment she started attending the school. This is the only club which physically hurt Rin in the game.
Japanese Sibling Terminology - Starts referring to Rin and Kaede as onii-chan and onee-chan ('big brother' and 'big sister') in her Visual Novel route. This is notably also the route in which she and Rin become lovers, so make of that what you will...
Laser-Guided Amnesia - In her own route, she gives Rin this so he won't miss her when she's taken back to be experimented on again, while they are having sex.
Magic A Is Magic A - Primula's magic is seen in the form of freezing her surroundings and when she was put back under observation, explosions in the vicinity, similar to Mewtwo.
Kaede Fuyou lives in her house along with Rin, and openly states that the meaning of her entire existence is to "serve Rin-kun." Her mother died when she was little, and her father is often on business trips, leaving both Rin and Kaede alone in the Fuyou household. Kaede had a very emotionally traumatized childhood. Her mother's death (along with Rin's parents) caused her to lose the will to live, so Rin lied to her by saying that it was his fault that they died in the crash by calling for them to come back. As a result, Kaede abused Rin for most of their childhood as revenge, until one day when she discovers a letter that her mother wrote to her on the day she died. She discovers that it was actually indirectly her fault that her mother died, since she was gravely ill therefore Mrs. Fuyou and the Tsuchimis went out to buy medicine for her. She snaps, runs off to the street and nearly gets hit by a truck until luckily, Rin was able to pull her out of the way. She apologizes to him for all the years she abused Rin, and as a result, pledges that her only reason for continuing to live was to serve Rin, to make up to him for all the abuse she piled on him.Tropes associated with Kaede:
Inverted, as it was only because she was starved of affection by Rin ignoring her.
Covert Pervert - Don't forget that Really? Really! happens inside of her mind, and there are a lot of times where Rin has sex with other girls. All of those events are purely fictional and product of her imagination, including scenes like a threesome between Rin, Asa and her mother.
Instant Fanclub - Kitto Kitto Kaede Not so much on the instant at least from our perspective as viewers. It can be presumed to have existed since Kaede entered high school and is well established by the time the story begins.
Parental Abandonment - Her father is on a business trip for the entirety of the anime, and is only seen in flashbacks. Her mother is dead.
She also thinks Rin is the Stepford Smiler by pretending to forgive her for the abuse, but that's not actually true.
Yandere - However, it's only in the anime. In the Visual Novel she's almost exactly the opposite; she has no sense of self-worth to speak of and believes she doesn't deserve to be loved by Rin. Not only does she not interfere with whatever girl he chooses, if he tries to choose her she attempts to turn him down.
Asa is both Rin and Kaede's senpai, having known them since middle school. She's very tomboyish and initially views Rin as a younger brother, and is fond of slapping Rin hard on his back. She's also the most forward among the girls (with the exception of Kikyou), but whether or not she's serious is a mystery to Rin.Tropes associated with Asa:
Dawson Casting - Miki Ito was pushing forty-five when she voiced seventeen year-old Asa-sempai, and is clearly straining her voice in certain scenes to pull of the perkiness she could so easily convey twenty years ago. Heck, the voice actress of her mother (Ama Shigure) is twenty years her junior.
Fanservice - The first Ecchi shot in the entire anime was of her topless in the Beach Episode. It was also the first Episode to receive a "This programme should not be watched by viewers under the age of 18" card in its initial broadcast.
Half-Human Hybrid - Her mother hides demon ears under her cap, and that's not even the full story.
Ill Girl - She often becomes ill for no apparent reason. It's revealed that her illness is her weak human body being unable to support the magic she inherited from her mother, Ama. Which she utterly refuses to use, since magic as a whole brought poor Ama lots of pain.
Which is a bit idiotic, considering her slow and completely preventable death would be far, far more painful to Ama than knowing her daughter has magic.
Image Song - Wish, and Kimi to Mirai wo, a duet with Kaede.
Kareha is Asa's friend and also Rin and Kaede's senpai. She is of the God race, and she is known to fall into trances when imagining romantic things, sparkling as she does so. She becomes one of the heroines in On The Stage.Tropes associated with Kareha:
Covert Pervert - Only covert in that she doesn't say out loud what she's imagining. However, whenever a situation that could be construed as romantic or perverted presents itself, she will Squee! and glow.
Fangirl She finds even the slightest hint of Rin in a romance with another girl, she Squees.
Fanservice with a Smile - She takes a part time job at the tea shop Flora, notable for their cute waitress outfits.
Single-Target Sexuality - She says in her route that she's never been in love before Rin, and likely would never have been if she hadn't met him.
Zettai Ryouiki - Special mention goes to Kareha, by virtue of her uniform at the shop where she works (The five main girls have all sported Zettai Ryouiki at some point)
Mayumi Thyme (voiced by Miki Inoue / Kelly Green)
Mayumi is classmates with Rin and Kaede and Itsuki. She's known for being always updated on any scoops that come by, especially if it involves Rin's lovelife. She also becomes one of the heroines in On The Stage.Tropes associated with Mayumi:
Berserk Button - Do not look down on her for her flat-chestedness. She will punch you. Hard.
Itsuki's mantra is to love all girls equally. Academically at the top of Rin and Kaede's class, Itsuki dreams of ending up with a harem consisting of the girls that Rin does not pick.Tropes associated with Itsuki:
Ama is Asa's mother, who has always taken care of her whenever she got sick. It's revealed that Ama was the first test subject of the Yggdrasil Project. Eustoma and Forbessi state that she blew up the entire lab, but instead, she wandered into the human world, injured, and meets a man who she would later have Asa with. Asa's Ill Girl nature is a result of Ama's enhanced magic being passed onto Asa's human body; as a child, Asa saw her mother cry silently more than once, and swore to herself to never use magic so she wouldn't make Ama cry over it..Tropes associated with Ama:
House Husband - He's the one who cooks Nerine's lunches (at least until she learns cooking from Asa).
Satan Is Good: The King of the Devils is also an affably guy and a doting father.
Lycoris (voiced by Haruka Nagami / Mary Morgan)
Lycoris is Nerine's clone. After the failure of the first experimental test subject (Ama Shigure), the scientists decided to take someone who already had strong magical abilities to experiment on. Nerine, with her power, was an ideal candidate but since she was Forbessi's daughter, they could not risk Nerine's life, even if she was willing. Thus, they cloned Lycoris from her cells, however, as all clones go, they have a short lifespan. Nerine then fell ill, and Lycoris volunteered to sacrifice her life force for Nerine's sake. That is how Nerine and Lycoris became one. It is also revealed that it was Lycoris, not Nerine, who met Rin.Tropes associated with Lycoris:
Kikyou is Sia's sister. It was evident that only Sia would be born safely, and so Sia made a pact with Kikyou when they were still unborn, enabling her sister's soul to share her body.Tropes associated with Kikyou:
Body Snatcher - In the anime, when Kikyou got pissed off at Sia for being so passive, she decided to take over for a day to try to appeal to Rin. It didn't work. In the original Visual Novel, this is actually forced on her when Sia thinks Kikyou deserves to be happy with Rin.
Femme Fatale - Far more aggressive than Sia in her pursuit of Rin.