Momabake

Momabake is the het ship between Obake and Momakase from the Big Hero 6 fandom.

Canon
Obake that first saw Momakase in a new report of her arrest, as it related to Big Hero 6 and was gathering data on them.

A couple of weeks or a month or two after, Obake went to the prison that Momakase is being held at, disguised as a prison guard where he gave her a Graphene shard, since it is of the same mistrial as the knifes she uses, to help her escape. Before he felt her to it, Obake tells Momakase "You can thank me later". During her escape, where she is being cashed by Big Hero 6, Obake sent one of his drones to keep them from catching the escaping thief. After Momakase was able to loss both the superhero team and the afforiyies, and is lead to Obake's lair, he offers her the chance to exact her revenge on the team by joining his "club". With the device that will keep Baymax from finding her with its/his scanner, the information that Obake has collected on them and the promise of revenge, Momakase agrees to Obake bisness purposial.

Fanon
There is a chance that the ship began after Fred gave them two idea options for their ship name, after the Big Hero 6 found out that they are working together, and possibly due to the fact that out of Globby and Noodle Burger Boy, Momakase is someone that Obake can talk to, who isn't an "ident" and is a sinister, skilled thief that has encountered the superhero team that Obake is "fascinated" with.

Fandom
TUMBLR

Trivia

 * Two of the ship's names was mentioned by Fred in the Big Hero 6: The Series episode, Fan Friction. Along with a few of other ship names within the Big Hero 6 fandom.
 * Fred had also mentioned in the episode that he has his money on Momabake.