EXTRA CCCでも、FGOのコラボイベントでも名前だけは出るのに姿は出ない不遇っ子なBBBです。
たぶん無垢っ子で無知っ子、素直で褒めれば伸びる子。性格に製作者のBB要素殆ど無ぇ……。
何かの因果でカルデアに呼ばれたら、マスターの袖の端とかを掴みながらカルガモの雛の様に後ろをついてくるみたいな。

It is an unfortunate BBB who only has a name but does not appear in the EXTRA CCC and the FGO collaboration event.
Probably an innocent and ignorant child, a child who is honest and can grow if praised. There is almost no BB element of the producer in the personality...
If you are called by Chaldea for some reason, it seems that she will follow you like a karugamo chick while grabbing the edge of the master's sleeve.