Valera is a humanoid Dragonic Snake empress that lives amongst modern society not that everyone around is just human anyway.

Her age is unknown but she has stated it's past a millenia amongst the known female demonesses this is not suprising and it's almost common.

She may be a maneater but she has actual genuine interest in people around her yes she may have become deep lovers or friends with many with only to most of them being eaten whole but she is not mindless.