Sensei appears to take great pride in his job and in the "noble sport" of karate, though he offhandedly mentions that he's only the sensei for a strip mall dojo.
In "Red Belt", Sensei is shown to be somewhat immature, as he still lives with his mother at the age of 38, rides a bicycle, and has a short attention span. This is implied to be, at least in part, a consequence of his failure to move past the green belt level of karate up to that point.
In "All Belts are Off", he is shown watching children's cartoon shows, and admits to learning most of his "life lessons" from them.
Sensei has tanned skin, brown eyes, brown hair and a thin black beard. He wears a sleeveless black karate uniform with a red stripe on one of the legs, a red belt, and a red dragon figure on the chest area. He also has a pair of yellow earrings, a red headband, white shoes, and white tape on his forearms. There is a small tattoo on his left arm with a Japanese character that means "sky", "heaven", or "god".
- Theme Song (season 2)
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- Sensei's real name is revealed to be Brantley in Star and Marco's Guide to Mastering Every Dimension.
- ↑ Marco Diaz in "Red Belt": "I actually wanted to be like you, but you're just like me -- except I'm not gonna end up 38 years old and still living with my parents."
- ↑ Sensei in "Trickstar": "I just want to thank you all for showing up to my 38th birthday bash."
- ↑ Star and Marco's Guide to Mastering Every Dimension by Dominic Bisignano and Amber Benson. March 7, 2017. Published by Disney Press. ISBN: 978-1484774199.