When an artist draws an [[original]] character which was originally created by a different artist. If an artist draws his own original character(s) with the borrowed character(s), or draws borrowed character(s) from more than one artist, also tag [[crossover]].

Note that "描いてもいいのよ":http://dic.pixiv.net/a/描いてもいいのよ is not supposed to indicate a borrowed character. It is supposed to be used to indicate the original artist is fine with others drawing their character. 

h4. See also

* [[borrowed design]]
* pool #1338 (Popular Artists Draw Other Copyrights)
描いてみた 描かせていただきました 描かせて頂きました よその子 お借りしました よそのこ 人様の子