Tsukasa thinks it over as he dresses. "I suppose I assumed I would be okay," Tsukasa says. "You kept a more open mind." Senku waited for evidence either way. He doesn't mind that Senku said nothing of it before Tsukasa transformed. He swore to protect Senku, and if getting hurt transforming the first time did that, so be it. They weren't in any immediate danger.

"Gram," Tsukasa muses, "not Kilo or Liter." He smiles. Kilo is a prefix, admittedly, but people use it all the time on its own for mass. He follows Senku along because he doesn't know this place generally, much less how to navigate to Senku and Gen's home.