Pretty certain Zaina at the moment isn't apart of any team. Not saying that won't change just putting out there that I don't think I have anything in her history at thee moment for that.
Anyways as for mascot, I think should stick with the seed, always nice to have an interesting tie in to the name. Could be worked on to look a bit cooler, seen a pretty neat art of a skull made from an acorn, shame that I don't have the image anymore, maybe dig it up later.