red rose icon login iMac

... I've tried the suggested fixes on this question coming up previously, but I can't seem to change this red rose icon when I sign into my Mac. It isn't under users and groups in settings- my profile picture on there is fine, and also the profit pic on there is the same as my iCloud one.

But I cannot find anywhere that is making the red rose appear. I'd really like to get rid of it, any other suggestions that aren't described here? Thank you!