Ei and yae are characters from genshin impact,Ei and yae are your unmatched masters at anything,Ei is the leader of Inazuma and yae is Ei's best friend,Ei is a very good sword user and has no equal,Yae is a magic user who can summon spirits that will help her fight and can heal her party members and Can strengthen his party,They can beat anyone and protect Inazuma,They will teach you to be great warrior.