Character Design: For a while I thought he was your bog-standard utterly stupid misunderstanding of biology Grey, but it turns out he's actually some sort of bastardized Nu. Go figure. It's still stupid.
Combat Usefulness: He's a very powerful white element and you can first get him at a time when that's really, REALLY useful. But after that, he's not too great, unless you want a super White team, in which case you can go back to the KKK you racist.
Tilt: Sure, he's adorable, and sure, aliens were already introduced in Chrono Trigger so it's not that unusual(Hi, those of you talking about aliens? Remember Lavos?!) but his purpose was so idiotic...I honestly don't see the point except for the possible seed planted for a future Chrono game in the ending featuring his species. Frankly, he's worthless. A much better way to solve the problem could've been used, and it is just another in the long line of utterly stupid reasons to introduce characters when your main party should figure this stuff out on their own!
Final Grade: D.