I think I would like this Chase-Kiriko thing if there was more to it than just "Oh, you save me once from a monster." Especially on Chase's part... Why did Kiriko spark his memories back? He probably saved lots of people before being controlled by the roidmudes like the news reporter he saved in Episode 0. While we're on the topic, why did Steinbelt pick Kiriko to be his helper or her brother to be Mach or Shinnosuke to be Drive? At least with Rinna, she's a scientist that could help build stuff he needed, those three don't really have valid reasons to be where they are.