^I don't like yanderes and don't get the appeal (even if I like a yandere character I prefer to ignore the yandere traits), and whenever people try to explain it to me they just sound like psychos who want someone even worse than themselves, but the writers really made Vira work. She's my favorite character in Granblue Fantasy at least among the women.
That said, the game is gacha and very grindy, so I wouldn't recommend it to anyone who isn't already playing. If you want to experience Vira, there's an anime adaptation of the first 8-ish arcs (I never finished S2 so I don't know where it stops) and Vira appears in the first arc of the second season.