Official PvZ Comics Characters in Fan-made PvZ Comics

Me and some friends of mine started making some fan-made PvZ comics and we wanted to know if it's okay to include some characters from the official comics in our fan-made comics. We don't intend to monetize this or anything like that.

Idk if it is ok to ask on the forum, and sorry if there are some bad grammars in the text english isn't my main language