He seems like a very easy to impress person, as he was shocked that Jevik was able to stand on one leg.
WARNING: The following is conjecture and is an interpretation of the canon found in the episodes.
Mushroom Man and Garen's past goes far back till at least high school, though from Mushroom Man's end the relationship seems rather reluctant.
Mushroom Man has not made any significant relations with any other of the characters in the series.
|Appearances for Mushroom Man|
- His name is not officially referenced, but he's been referred to as Mushroom Man after production.
- His existence is considered non-canon by Ids5621, meaning he's likely Garen's hallucination.