|Out of universe information|
|Teachers and Students|
| YOU'RE NOT ON
Some TMNT stuff really isn't for little kids.
| This article's title is conjectural and may be subject to change as new information becomes available.
In the IDW continuity, the unnamed father of Natsu died in the past along with Natsu's mother, leaving Natsu to be raised by her maternal grandfather Hayashi Toru. In Karai's Path, part 3, Toru blamed his son-in-law's adherence to honor for causing both deaths.