User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-86.7.140.20-20140109225251/@comment-7418318-20140109225648

No, we are basing it off their similar look and smell.

Gray only learned ice-magic when he was something around 7 or 8 and he didn't exactly have a wide variety of magic-types to choose from, so the similar magic matters little.