I think Marcy and Malcom would be cute! I feel like they're an example of how opposites attract, specifically color-wise. Marcy is pretty bright colored, and Malcom is pretty duller/neutral colored (not super dull, but just not super bright. Usually very pretty colors!). I also like that they both look British to me :^) Their ship name would definitely be Malcy!
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Go crazy with my characters. If they're already shipped with someone, pick a diff one pls :]
edit: omg that's actually so cute 😭😭 i probably will make that a ship