Tenten & Neji Hyuuga were placed on a team with loveable Rock Lee as children. Ever since they met eachother, they constantly protected one another. Gai Sensei always had a feeling they'd fall in love with eachother & get married someday.
Turns out he was right, they got married & had identical twins. The boy twin was named Yoime Hyuuga. Neji didn't want his children to ever be like weak Hinata, or the upper Hyuuga branch. So he trained his kids hard, but treated Yoime unfairly & worked him ruthlessly with no compassion for him. This caused Yoime's childhood to be bitter, & give him a cold smirky attitude which caused him to have almost no friends at the academy. He has always hated his sister & tried to kill her as children. This has always worried Tenten. Yoime carries on the byakuugan, has learned ammature gentle fist, & has his mothers skills with weapons. He was placed on team 2 with Shikaru Nara, & Kidan Akatsuki.
An RPC done on MS paint only. Off of a screen shot of Neji at the chuunin exams.