He was a bit surprised to be called to, partly because he almost forgot to answer to his last name, he so rarely used it anymore.

"Ah, Haibara. Well..." He nodded, he was planning on using his second potion. She didn't look too heavy, but really if anyone was going to carry someone like Suika, it would be Gen and not him, but Gen's not with him at the moment.

"I don't mind." Senku decided, because he was going to decide that anyway. He recalled coming up he was able to tug Gen along without a problem, so hopefully the potion would do the work for him. He took his bag off of his shoulder and crouched down. "On my back work for you?"