Solanum

It's not so much that Solanum is evil or even amoral as that she was raised Differently Valued. She most certainly has rules and a moral compass, it's just that sometimes it points in a direction the rest of the world would consider Due Murder.

She's perfectly nice. Means well. Devoted mate and probably going to be an equally doting mother someday. She's a pretty great organic chemist. She does this tonal singing thing when she's enjoying her work that sounds like a brass windchime in a waterfall and is probably lovely and moving if you understand Coatl.

No one's asked any of the other lair Coatls, because they all seem to be scared to death of her, nice lady though she is.

Also, she bakes. It smells like where you go after living a very good and virtuous life. They're beautifully decorated, softly colored little confections. The young would-be toughs who dare each other to eat them say they're as delicious as they look.