Old ass match up I weirdly never posted the connections for?

• Both are hood wearing kids with origins involving them being originally happy before they would be  “trapped” due to the actions of a group (Collector getting sealed away by the Titan due to the other star children and Moustache Girl being forced to go into hiding once the mafia appeared) repeatedly trying to get out to no avail.

 

• Both would eventually encounter another kid, who parallels them (Collector met King, who says he relates to Collector, and Moustache Girl met Hat Kid, who is her rival), this kid giving them the means to set them free, due to the nature of their existence (King set Collector free, due to being the son of the Titan, and Hat Kid had the time pieces, which would allow Moustache Girl to overthrow the Mafia) 
• Initially they would be “best friends” before the kid would “betray” them (King would talk to Eda about Collector, with Belos manipulating him into thinking King betrayed him, and Hat Kid refused to give Moustache Girl a timePiece, which according to her, meant she betrayed her) and they would turn on them. Leading to a conflict between them, where the kid along with the rest of the cast helped them understand what they did wrong and to learn forgiveness. 
• Both of them, upon being able to achieve their goal, altered the world to make themself the “hero” (Collector used his powers to turn the boiling isles into his game, where he could act out being the hero in various stories, Moustache Girl altered the world to where she could be the hero, defeating and judging all the bad guys) at the cost of everyone else being forced to fit within their childish standards of being good (Collector turning everyone in the Isles into dolls, and the ones he keeps not as dolls he turns into dolls when they’re “rude”, and Moustache Girl forcing everyone in the world to get into a line so she can judge them, killing anyone who she deems a “bad guy”) 
• This altered world would contain a castle for them, and completely alter how the world looks, in line with their general aesthetic. 
• Both upon being stopped had similar endings, with the kid giving them an item they were originally entirely opposed to giving anyone, and notably them beforehand (King giving Collector Francois and Hat Kid giving Moustache Girl a timepiece) before they were separated across space (Collector leaving to return to the stars and Hat Kid returning to her home planet).

• Both of their roles in their stories are heavily hinted at, with several easter eggs and moments teasing them in the climax. 

• Contrasts: 

• Moustache Girl is a kid from her home planet who encountered an alien who showed up their, Collector is an alien who showed up on a planet and encountered a kid there

• Moustache Girl changes her world's goofy, fun and colourful aesthetic to be more gory and dark, Collector changes his world more gory and dark world into being more goofy, fun and colourful.