(MC1), being the "unremarkable protagonist" of the four, uses a simple Normal Beatdown Deck that revolves around a powerful central card. When his ace monster, Heroic Scholar, is activated in a Pendulum Zone, he can add this card to his hand, which can be activated to prevent his opponents from responding with any card effects during battles with Normal Monsters, for at least two Battle Phases. His Deck is designed to turbo out as many hard hitters as he can to take advantage of this effect.
(MC2) uses a Guild Deck focused around turboing out her boss monster. She hails from a universe in the past that hasn't had many technological advancements, which is reflected in her Deck using Fusion Summon, the oldest summoning method of all that are included in this crossover.
(SP2-1) utilizes an Air Fortress Deck focused around Ritual Summoning and highly defensive, resource-focused play.