looks like a castor plant to me; many varieties. I have a 'little carmencita' that I love, but they reseed like mad. easy enough to pull up.

Could be a sumac seedling. Hard to tell from that angle.

Pinnate leaves so not Ricinus. Could be Sumac, Ailanthus or Juglans. Can we see the whole plant, please?

Here's the top view. It's about 6ish inches tall and the stem looks like it's going to be woody. It was originally totally red but now green leaves are developing. Its cute but growing fast. Trying to decide if I want to keep it. Thank you so much everyone for your help!

I've read up on all the suggestions and I'm suspecting it's a sumac. They're regarded as super invasive here (southern WI) so I'm going to pull it. Thank you all for your help!!!