Fire Emblem: Three Houses vs Legend of Heroes: Trails of Cold Steel
Connection:
Both are blue-haired swordsmen/swordswoman who become teachers in a religious school (The Officers Academy for Byleth and Thors Military Academy for Rean)
Both have powers of a mysterious beings (Sothis and Valimar respectively)
Both wield swords that only they can use (The Sword of the Creator for Vyleth and Kazekiri for Rean)
Both had "Ashen" in their titles (Byleth being the "Ashen Demon" and Rean being the "Ashen Chevalier")
