Mr. Reaper is a confident man, to the point he may get ahead of things. He seems to have a problem understanding when a student is not happy. That, or he likes to see them unhappy.
When Toralei Stripe had returned from math camp in "Back-to-Ghoul", she had apparently done well enough that G. Reaper took the liberty of enrolling her into every advanced math class Monster High had to offer. He seemed not to notice or care about her visible displeased reaction to the news.
- G. Reaper is remarkably similar to Mr. D'eath, who's been featured in nearly every piece of fiction but the cartoon. In fact, issue #10 of the UK magazine conflates the two by mixing D'eath's artwork and write-up with G. Reaper's name. It's possible Mattel intends them to be the same character, though the exact situation is currently unclear.
- Whereas G. Reaper only appeared in one webisode, the door to his office made a second appearance in "Monster Mashionals Part 1".