I just realized how similar Bro and Tina are:
1. Both are like sibling figures to their Sams
2. Both comforted them with ice cream..
3.  Both have complementary color scheme... Bro has blue hair and blue clothing and gold eyes. Tina has Pink hair with combination of pink and red clothing while having green eyes.
4. Both are mostly hand to hand combat.
5. Both were confused to be possible love rivals for the Sam X Tim pairing (Bro with Sam, Tina with Tim.)