It is pretty, but reminds me of Seymour in Little Shop of Horrors. I think I need to be afraid..,
I believe that is a spurge.
Like the one linked below.
Here is a link that might be useful: Euphorbia marginata
Yep, that's spurge. I know people who actually like it and grow it on purpose. I am not one of them. :)
After reading about spurge I couldn't imagine wanting that plant around.