Joxter is Snufkin’s father, who’s only appearance is in “The Exploits of Moominpappa” (1950). He is a supremely lazy person who is attracted to all things forbidden. He shows dislike for all things proper and hates regulations. Joxter clearly embodies many things Tove Jansson approved of; simple bohemian life and certain dislike for math. Joxter is also similiar to Snufkin in the way that they both are people who you would really like to earn respect from. Joxter’s clear eyes see through all of Moominpappa’s pomposity and make him feel insecure. Books acknowledge how hard it is to feel good about yourself in front of an independent person who does not need your approval and thus does not think to express their approval of you.
In the books, Joxter gets together with Mymble (older). She is, according to Joxter, a special kind of woman. Her happiness simply enchants him. Mymble is the mother of Mymble’s daughter and Little My. Joxter and Mymble’s love ends up giving birth to Snufkin, which makes Snufkin Mymble’s daughter’s and Little My’s little brother. This was however removed from the 1990 Japanese cartoon, where Mymble is made a lot younger (the character who is Mymble’ s daughter in the book is introduced as Little My’s mother in the cartoon) and the romance is removed.
Joxter does not make an appearance outside of “The Exploits of Moominpappa” and is thus rarely mentioned in the canon or seen keeping contact with Snufkin after the book. However, one can assume this is just the natural course of things for free-spirited snufkins.