I need to brainstorm

[Destai]

To personify something is to give something non-human human qualities.

Last two definitions is what I think you want to know.

That makes it more clear but I still dont get it. I've heard a thanatos is a personification of death. Death with human qualities? What?

Well yeah, you are giving it human from so it can be classed as personification.
Personification is often used to write descriptively, for example:
"The wind whispered through the trees."
Wind does not whisper, it is a human quality and therefore you are personifying wind.

OHHHHH I think I get it now.