He is very patient with his young students and very tolerant of their antics. However, he is often exasperated by the way Mertle and her friends disrespect Lilo, but strangely doesn't do anything about this because it usually looks like everything was Lilo's fault.
- For some reason, his surname changed to "Petuli" in the episode "Cannonball", as Lilo called him "Mr. Petuli" when she arrived at the halau late after feeding Pudge, though he still had his given name as Lilo referred to him by his first name back at her house after school.
- The classmates often call him "Kumu" which means "teacher" in Hawaiian.
- In "Spooky", its revealed Moses has a fear of spiders.