Soooo bascially, omegaverse (Alpha/Beta/Omega [ABO]) is a storytelling setting that's become super popular in mangas/manhwas lately. It features characters as omegas, betas, or alphas. There are also subcategories for the omega and alpha roles, like submissive and dominant, plus a "switch" option where characters can change their traits. My friend and I were chatting about an ABO visual novel that we both played, and that got me thinking about it, haha!
Now as to how they would do in the setting and which trait they'd have... that could be a major spoiler XD but I can safely say that Merka would definitely be a Beta! LOL