SCP Foundation

I had an idea to create this character in order to kill a character of mine.
I thought it should kill/feed by playing with emotions and memories until the victim goes insane and commits suicide. It'll subtly change their memories the more they touch/pet it (because I pictured it as a cat-like creature) and that it aims to make people depressed or angry.
It also feeds on the victims emotions (but it still can eat meats(?))
I've nicknamed it Pretzel but a friend of mine has been calling it SCP-2162.

it should kill/feed by playing with emotions and memories until the victim goes insane and commits suicide

This is a pretty overdone idea, to be honest. We've got lots of things on the site that mess with emotions and cause compulsions and insanity, to the point where "crazy 'till ded" has become a very common theme.

What will make this thing different from a rock that messes with people and makes them suicidal? Where does it come from? Why does it exist? Why does it have these abilities? Are its abilities important to it?

a friend of mine has been calling it SCP-2162.

So you know, we don't allow people to reserve SCP numbers. Most people use "SCP-XXXX" as a placeholder in drafts.