This... is definitely interesting... that back tire looks like a smooth glass or plastic, therefore if she were to rest her... self on it... intriguing... though it might prove difficult to continue pedaling...
For the character request, the girl closest to Touya is a camper I believe, and the one on the bike I'm fairly certain is a cyclist, but I don't know what they're listed as here ><
According to the artist's description, it IS made of a special material...my translator says "konjac". http://en.wikipedia.org/wiki/Konjac Can anyone verify?