Mortan is marv's little bro he is lola's friends they first met when Charlie and Marv were on a trip and Lola and Morten staying at the house. At first Morten did not want to play until they blew bubbles in their drinks and played bubbles outside.

he is actually shown to have a stubborn side too in  "we have every thing in our shop "when Lola and Lotta should Charlie's goggles for a bag of chips.