How old were Gladio and Lillie when Mohn went missing, anyways? I know Gladio at least remembered him, though Lillie never mentioned him. At the same time, Lillie (and by extension Gladio) still remember when Lusamine used to be nice...
Because Lillie is the bastard child meme/joke won't ever die now. And I suspect the Anime Lillie will be overshadowed by game Lillie for a good while even after the Anime gets past it's first season.
