In "Recipe for Disaster", Lincoln and Clyde interrogate him at the ATM machine as to where he got the money and explains that he got the money after his great-aunt passed away to which Lucy confirms.
In "Present Tense", he gives Lynn Sr. an actual Beef-eater from England to the point where he had used all his airline points to fly it to him Royal Woods.
He is a tall man with black hair and black eyebrows. He wears a blue jacket with a white collared shirt underneath, gray jeans, a black belt with a silver buckle, and black boots.
Trivia
He is the first character to refer to Lynn Sr. only as Lynn.
He might be of Japanese descent due to his eye shape and his name.
According to Lynn Sr. in Listen Out Loud, he always picks 'scissors' during 'Rock-Paper-Scissors'. In the same Listen Out Loud video, it's revealed that Kotaro and Mr. Grouse get along well. In another Listen Out Loud episode, it's revealed that Lynn Sr. once baked him some cookies for his birthday, but Lola ate half of them.
"Vantastic Voyage" reveals that he owns a dog, who had puppies in his van.
Not counting Luna, he is the only member of Lynn Sr.'s band the Doo Dads not confirmed to have kids.
He is also the only member whose last name hasn't been revealed.
