Lachesis

First appearance: Fire Emblem: Genealogy of the Holy War (SNES, 1996, JP)

"I need a man the calibre of my dear brother. That's why I'll never marry."

I was recently looking at Hanahaki disease art pieces, when I realized Lachesis was the perfect character to draw with the Hanahaki disease; I had to considering a major character arc she had was her overcoming the love for her brother.