Basketball

Basketball is a female contestant in Battle for BFDI and Battle for Dream Island: The Power of Two.
Personality
BFDIA
Since Basketball didn't compete, not much of her personality was shown. However, in "PointyPointyPointy ♫", it was shown that she could be very spiteful and jealous to Tennis Ball whenever he calls himself the "only ball with lines". This most likely happened in "The Reveal", after she said that tennis balls aren't the only balls with lines.

BFB
Following the "only ball with lines" shenanigans in BFDIA, Basketball and Tennis Ball started to become minor friends.

Basketball was more of a follower and is very loyal to 8-Ball, usually supporting his endeavors. Basketball also cares about the well-being of her fellow contestants, as she picked Grassy for her team when no one else would, and she felt that Four's violence was getting out of hand.

As the season progresses, Basketball becomes unsure of her role in her team at the time, being considered untrustworthy by team leader Golf Ball. Basketball was also generally a curious person and can be quite handy, and will solve any problem in any situation regardless of her surroundings, such as helping her team and Bleh to make sure they were still able to defend themselves using Robot Flower from losing in "The Liar Ball You Don't Want" despite still being on the Moon, although her plan backfired. She appeared to become nervous under pressure, as shown when she shouts to stop controlling Remote when things went haywire, and appeared to be sweating when she was discovered impersonating Rocky.

TPOT
Like Golf Ball and Tennis Ball, Basketball had a talent for scientific pursuits, operating her own aboveground factory in the hotel to develop technological innovations. Over time, she transitioned from an oblivious follower to a proactive team member, splitting from Are You Okay to form The Strongest Team on Earth.