You had been brought back from petrification a bit before Tsukasa, and you honestly found him to be amazing. He was strong, kind, powerful, if not a pessimist. However, him and Senku ended up fighting… and while you didn’t agree with Tsukasa’s methods, you could understand his reasons. So when Tsukasa split off from Senku’s group, you made a spur of the moment decision to run after him. He stopped walking when he noticed you.

“Why’re you following me. Go back to Senku.”