[Raidou looks away at that question, and takes a moment before answering.]

... Back home, I was a summoner. I arrived here without my summons. While I am capable with a sword and a handgun, such skills were proving to be too little against enemies of such a scale. Obtaining both the healing and strength-enhancing nanobots means that I am less of a liability, and more of an asset to my teammates.

[The words feel a bit rehearsed. He's given this explanation a few times. He pauses, looking back at Ken again.]

... Your transformation. That was pretty cool.