For more than the price of a monthly FF14 subscription, you can participate in the FEH subscription, allowing you to get alternate art for powercrept units at 4.99 per hero.

Ike is a child of incest

There is a cut support conversation between male, and female corrin involving the female corrin trying to get laid with themself.

Starts with an M

In Fire Emblem Echoes, Alm rescues the priestess Silque from a group of strangers she was following. Silque then decides to follow Alm's group of total strangers with no convincing whatsoever

While Smiling happily in the sun, the summer variant of Takumi will command you to drown.

In FE4, Arvis ends up having kids with Deirdre, his half-sister. He only learns of this long after the children are born, but his life sucks so much he doesn't actually care.

It is possible for the player to create human skin boots

Starts with an H

In Fire Emblem Awakening, Cordelia joins the shepards because she wants to bang Chrom. She is one of the only female characters who is not eligible to bang Chrom.

For the first year of FEH, an S tier lance was the comically large spoon.

In Fire Emblem Fates, there is a subplot involving Corrin's adopted brother Leo falling into an incestous bloodlust. During this part, Corrin has to convince Leo he is in fact not banging their adopted sister, and consents to Leo having them for himself. (you can do this while still banging your adoptive sister)

War is legally declared in 5 countries, only two countries are ever mentioned.

Starts with an S

In Fire Emblem Fates, the crown prince of Nohr, Xander, decides to appoint not one, but TWO serial killers as his retainers.

Fire Emblem Heroes canonically uncanonized Fire Emblem Awakening

Due to how Robin can marry any unit, he can make Lucina her own Grandmother.

In Revelations, there is a support conversation told entirely in ellipses.

Starts with an R

In Fire Emblem, Radiant Dawn. Oliver, a boss in the previous game, Becomes a recruitable unit. As a slave trader, he decides to join Micaiah's army after noticing that there are birds in her army.

FEH canonized and acknowledged the fact that ALL Fire Emblem Characters do not have nipples.

nearly 50% of Fire emblem games feature incest in some way, shape, or form.

3 Characters from Fire Emblem Awakening travel to the world of fates via portal to slay a dragon, another three from the same game enter the world of fates by just getting birthed again.

Starts with an I

In Fire Emblem Awakening, Chrom recruits a child serial killer because he thought his standup was funny.