You and Senku have been friends since before the stone world. But you feel useless since you can't do nearly as much as Senku can. It hasn't been easy for you with your anxiety and the possibility of an attack from Tsukasa's forces once spring arrives

So that is where he found you, sitting in the lab which has yet to be installed with a heater, working on something in the cold dusk of night

"Avera Kim, what are you doing out here. It's freezing."