They have sisterly bestie relationship!

Mai is the one who teaches Momo how to make up ♡♡ And she opens up enough to tell her secret (her age) to Momo, because she want to make sure that Momo won’t get wrong ideas about her relationship with Trunks. She is no.2 TruMomo supporter! (Of course no.1 is Goten lol)

Mai see Momo as her baby too. Every time she’s see Momo, she always thoughts that this would how she feels if she have a child 🥺 And Mai existence Momo who’s surrounded by friends that has siblings feel less lonely, Mai is like a very cool big sister for her!

They have common interests too. Like love novel , cosmetics , romance etc.