I'm almost certain that Pyra's outfit here is modeled after Summer Dorothea from Fire Emblem: Heroes, which might mean that Mythra's outfit is based off another character as well.
I'm almost certain that Pyra's outfit here is modeled after Summer Dorothea from Fire Emblem: Heroes, which might mean that Mythra's outfit is based off another character as well.
Mythra's summer outfit is based off Summer Mercedes as well.
