Artist. The name seems to come from "Landolt C.":http://en.wikipedia.org/wiki/Landolt_C 

Japanese name: ランドルトたまき (Landolt Tamaki)
Circle & site name: ルート十二面体 ([i]Root 12-men tai[/i], lit. Root 12-hedron)
Joke name: 髭⑬〒岐
landolt tamaki