Roy just received an alt in Fire Emblem Heroes, a mobile gacha game. He comes with a unique skill that grants himself and his allies buffs except for dragons and beasts. So jokes have been made about Roy being a racist. Mostly with dragons because his game didn't have beasts like Ike's two games. One of the dragons commonly brought up is Ninian who ironically can be Roy's Mom.

In FE: Heroes, ALL of Roy's weapon-related bonus skills are bonus damage against dragons