A name, you say? Here are some suggestions, free of charge.
Kevin's Purple
Barney (the purple dino)
Purple Tuxedo (it looks like it's wearing one)
Purple Porcupine (it does look spiny)
I wouldn't be surprised if there were some other genius ideas out there from some other folks.
When I was over at Lynn's garden recently I noticed how large some of her rollers had grown. They definitely wow'ed me as they make a completely different impression at larger sizes. It did rekindle my interest in rollers. So naturally I acquired another one from Lynn, here it is freshly situated.
I decided to move 'from Smeryouka' from the greenhouse out to the garden. I don't expect it to look like this living out in the elements.
I really hadn't noticed but 'BT' is steadily gaining girth. The one at Lynn's was awesome, I hope this one measures up.