This is a regular recurring theme in the ''FireEmblem'' series. Several of the girls in the player's party, well, admire their brothers a bit too much, with or without [[{{Bowdlerize}} some bits of censorship]]. Examples:
* ''Fire Emblem: Genealogy of the Holy War'': Princess Raquesis and King Eldigan of Nordion (she even straightforwardly says she won't marry a guy who's less cool than her brother.)
** Even the villagers seem to be aware of it. One village lady gossips about Eldigan and Raquesis being a little too close for siblings.
** It's hinted that Eldigan still considers Raquesis his Most Important Person, though, even if he does love his wife Grahnye. Sigurd says in chapter 2 that he cares about his sister more than anything, and [[spoiler: Raquesis' name is on his lips just before he dies.]]
*** The Oosawa manga makes this even ''more'' blatant, with them aknowledging in their last talk that they're in love ([[spoiler: with Raquesis almost asking Eldigan to be her first, but he refuses to taint her, settling for an implied LastKiss]]) and hoping there's a ReincarnationRomance deal out there... but [[DerailingLoveInterests sadly demonizes Grahnye]] by making her a ClingyJealousGirl who only allows Raquesis to join Sigurd's trope ''[[TheUriahGambit in open hopes to get her killed in battle]]'' [[spoiler: and is cold and indifferent to Eldigan's death unless it makes Raquesis cry]], rather than portraying her as simply jealous and lonely as would be expected. (And let's face it, it'd be weirder if she was ''not'' jealous.)
** Cousins Ares (son of Eldigan and his NPC wife Granhye) and Nanna (daughter of Raquesis and Finn) have a special lovers dialogue which ''directly'' discusses the trope as it alluded to Eldigan and Raquesis' past.
** WhatCouldHaveBeen: As noted on that page, Raquesis was nefariously close to becoming Ares' mother during development...
** Yet another example for ''Genealogy of the Holy War'' are the High Priest Claude and the Dancer Sylvia, whom many fans believe are ''really'' brother and sister. They both possess the Blagi bloodline, and Claude once mentions that Sylvia reminds him of his sister, who disappeared many years ago (and Sylvia says she's an orphan). And yes, they can potentially marry each other and have children (who are playable characters in the second half of the game). Though an official book shows that [[KissingCousins they're distant cousins.]]
** Ayra and Holyn can get together. Both have minor Odo blood meaning they are at least distantly related. [[spoiler: And in the Fujimori manga they double as ChildhoodFriendRomance, as Holyn always had a crush on Ayra but she forgot it as she grew up... [[GirlOfMyDreams save for her dreams]]. Once she recognized Holyn as the boy she literally dreamed of, they got together.]]
** Ayra can have kids from Lex, and you can pair her daughter Larcei with either Johan or Johalva, nephews of Lex. Even more so: Larcei has a crush and can hook up with Shanan, who is her half-cousin regardless of who her father is.
** If not paired with anyone else, Arthur and Tinny (children of Tiltyu) gets a special dialogue about her past and hinting that Arthur *may* have this kinda feeling to Tinny.
*** Actually in the case of Tiltyu's children, it is Tinny who gives the vibe of this one-sided feeling to her brother. Check her ending conversations:
--->'''Without Lovers'''
--->Seliph : Tinny, youíll be going with Arthur too, arenít you?
--->Tinny : I, I want to be of some help to my brother, thatís all.
--->Seliph : You and Arthur are really close to each other, eh?
--->Tinny : Thatís because...I like him...
--->'''Lover Dead'''
--->Seliph : Tinny, youíll be going with Arthur too, arenít you? Have you forgotten [character] already?
--->Tinny : Ummm, no, I donít think I ever would, but Iíll just try to do my best at going on with my life. Iíve met a very wonderful brother after all, weíll be trying our hardest together.*
--->* ''(The translator is TRYING HARD not to make it sound like incest)''
** There's also the fact that Julia, daughter of Arvis and Deirdre, has a crush on Seliph, son of Sigurd and... Deirdre, too. Must run in the family, dammit.
*** Seliph and Julia don't really count since they don't get anywhere and their feelings are left rather ambiguous (this is before they even find out they are siblings). Plus, the game data is specifically designed to reduce their RelationshipValues over time. (If they're not directly adjacent)
*** Except there are two methods that allows you to hook them up. One of them involves the fact that love growths for being adjacent occur even if the characters are not of the same affiliation (Us, Them, Ally, Neutral). The natural love growth only occurs if both characters are of the same affiliation and neither is in the main castle. The other involves the hidden jealousy system and the fact that if you go from the first gen straight to the second, Julia has the higher priority for Seliph until you reset the game.
*** And oh, Seliph's other {{Love Interest}}s seem to feel bad. Especially Lana for Julia should they engage in their "Lover Conversation" on the final chapter.
-->'''Seliph''': "But I've always liked you, Lana..."
-->'''Lana''': "I know... but it's just hard for me to accept that, Seliph. I feel so awful to Julia..."
** WhatCouldHaveBeen:...and just like the Eldigan/Raquesis example, originally, Seliph and Julia would've ''automatically become lovers'' during Chapter 8...
*** ...and to add to ''that'', in beta, Deirdre was originally going to be ''Vylon's'' daughter. Vylon is ''Sigurd's father.'' That meant that the OfficialCouple ''also'' dodged the bullet in being this trope (in the actual game, Dierdre's father is Kurth), assuming Sigurd's father wasn't someone else at that stage.
* Deirdre and Lord Arvis. Note that in the latter's case.... [[spoiler: Having the two hook up and ''breed'' is actually a part of the BigBad Manfroy's plan to create a vessel for his Demon Lord. And through MindControl in Deirdre's part and Arvis not knowing they're half-siblings, it ''happens''.]]
*** Actually, according to the designer notes, [[spoiler: Arvis ''does'' know. Thing is, he learned that Deirdre was his sister '''after''' they got married and had kids. By that point, however, Arvis's life sucked so much that he decided to not care anymore, he still loved Deirdre and nothing would change it at that point.]]
** And, because ''true'' BrotherSisterIncest and KissingCousins [[RuleOfThree is not enough tropes for a game this screwed up]], we have [[FlirtyStepsiblings Arion and Altena]], the biological son and, er, "adopted" daughter of King Travant of Thracia. [[spoiler:And by "adopted", we mean Travant killed her parents when she was 3 years old and took her as part of the spoils of war, so he had a member of the Noba bloodline to wield the legendary weapon her father had, the lance Gaebolg.]]
*** Remember that Altena and Arion are descendants of the Crusaders Noba and Dain respectively, who were ''brother and sister''. So they're technically KissingCousins, albeit very distant ones.
*** And not to mention, Altena can't fall in love with anyone in your army due to her feelings for Arion, [[spoiler: and she alone can recruit the guy into an allied unit for your group.]]
*** Still further, their characters [[{{Expy}} were inspired by ones from]] [[VideoGame/FireEmblemAkaneia the third game]], where it was pretty blatant that both Princess Minerva and Maria of Macedon were in love with their brother Michalis.
** Special mention needs to go to the ability to pair up [[WhiteMagicianGirl Lana]] and [[HorseArcher Lester]] with their cousins [[FriendlySniper Faval]] and [[TheTease Patty]]. Their mothers are sisters, so from a social standpoint they're cousins. However, their mothers are actually [[SilkHidingSteel Adean]] and Briggid... who actually are ''identical twins'', which means that from a genetic standpoint, they're half-siblings. It takes some skill to make two couples simultaneously fall under BrotherSisterIncest and KissingCousins.
* ''Fire Emblem: The Binding Blade'': Clarine of Reglay has a bordering-on-crush admiration on her brother Klein. She openly calls him "the most handsome in Lord Roy's crew" and he actually calls her out on it.
** There's a theory going around that Lalum may be Oujay's long lost little sister. Their supports are filled with Lalum endlessly teasing Oujay.
* ''Fire Emblem'': Lady Priscilla of House Carleon and Raven [[spoiler: aka Lord Raymond of House Cornwell]]. They even had a sort-of ChildhoodMarriagePromise going on... and she intended to ask him to fulfill it. Too bad that he does love her... just not in that way, but is more intrested in marrying his "nagging wife" [[HoYay Lucius]]... Then again, Priscilla ''can'' fall for others, [[UnrequitedTragicMaiden though it doesn't always work.]] Amusingly, she and Clarine are both Troubadors.
** Here's an interesting case: In ''Fire Emblem'' it's possible to hook up Hector with one of the [[FanNickname Pegasus sisters]], Farina or Florina, and pair Eliwood with the third sister, Fiora. Note that Eliwood's son Roy and Hector's daughter Lilina can marry each other in ''The Binding Blade''. HilarityEnsues.
* ''Fire Emblem: The Sacred Stones'': Ephraim and Eirika (which is actually {{Twincest}} as well). In a nice reference, though, Ephraim's unique weapon is the spear Siegmund, while Eirika's is the sword Sieglinde, twins who fall in love from ''Theatre/TheRingOfTheNibelung''.
** In fact, both Prince Innes (if you get his supports) and Prince Lyon are ''jealous'' of Ephraim because they don't think Eirika could be interested in another man. Of course, they both have their own issues (with the former sporting some kind of [[FoeYay hate]][[HoYay crush]] on Ephraim and the latter... well, let's just say not in his right mind) so they are not exactly reliable barometers.
* ''[[VideoGame/FireEmblemTellius Path of Radiance]]'' had Reyson and Leanne, two siblings who along with their sickly catatonic father are the [[DyingRace last herons left]]. Meaning for the line to continue, incest would be inevitable. [[spoiler: Averted by the sequel, Radiant Dawn, where [[InterspeciesRomance raven and herons can produce offspring of both races]], so Leanne hooks up with the Raven King Naesala]].
* And ''VideoGame/FireEmblemAwakening'' also indulges in incest, though mostly of the KissingCousins type. Chrom's daughter Lucina can marry Owain, son of her paternal aunt Lissa (though they're described as "companions" outside of Japan rather than "husband and wife"), and you can potentially build up other cousin pairings if you wish so (i.e., marry Owain to a Chrom-fathered Cynthia or Kjelle).
** With the exception of the [[spoiler:Male Avatar/Aversa pairing below (and even then, the latter is the adopted henchwoman of the former's father]], ''Awakening'' staunchly averts BrotherSisterIncest for once. Chrom cannot marry his sisters, ''and'' he has healthy, sibling-like relationships with both of them! Also, if any of the future children have an opposite sex sibling[[note]]Lucina can have either Brady, Inigo, or male Morgan as a brother, while female Morgan can be the younger sister of anyone else ''other'' than Lucina[[/note]], they cannot marry either.
** If you have a male!Robin father female!Morgan with Lucina ''and'' pair up Chrom with either Olivia or Maribelle... you can then pair up girl!Morgan with Chrom!Inigo and/or Chrom!Brady. Similarly, Lucina can marry a male!Morgan fathered by a girl!Robin with a Brady or Inigo fathered by Chrom. Meaning you potentially can get ''a niece/uncle or a nephew/aunt pairing'' via tweaking games mechanics. [[{{Squick}} ... Uh, yeah, nothing to see here.]]
** And then there are the bandit brothers Victor and Vincent, who are, in the game's own words, [[TwinCest "eerily fond"]] of each other. This also gets played up in their voice acting, as they both like to call each other "daaaarling" for example...
** And lastly, if you're looking for an outright brother/sister pair, there's [[spoiler:male!Avatar with Aversa]]. [[note]]Spoilered due to LukeIAmYourFather and the latter character being a SecretCharacter.[[/note]] However, they're NotBloodSiblings, as the latter was adopted. [[spoiler: If you call "Validar murdering a little girl's family due to her powers, brainwashing her into believing she owed him her life AND making her super ultra devoted to him" 'adoption', that is]]
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