Sophia is definitely not Bella's idea of a fun swim mate. She is extremely aggressive in the water - much to Bella's dismay. She seems to enjoy making Bella scream -- I say this as she was usually smiling as she was grabbing.
I think Bella likes to swim solo.
Unfortunately, this summer, Bella and Sophia have to swim at different times. Sophia just gets too wound up in the pool and Bella spends all of her time trying to get away from Sophia. I miss them getting in together, but after only two tries it just didn't seem to work out. Water sure makes Sophia come alive!