Probably because I am currently attempting to cover all its songs, I did a crossover with these guys and the game featured here: Cave Story. AKA one of the best indie games ever conceived by a one man team. I highly recommend giving it a look.

Casting:

• Rina as the resident doofy-yet-dependable Curly Brace, who I figured would have an affinity to rescue every last unfortunate adorable creature present
  

• Rino as the main lead: "Mr Traveler," who I figured would't pass up the opportunity to be a vid-game protagonist who powers up by collecting what resemble Doritos

• Charlotte as resident Team Rocketesque member 1: Misery, who fits as a powerful mage (or mage-like in Lotte's case) and is chained to an extremely powerful arcane artifact. I noticed Lotte also could have also worked as our silent main protagonist; heck, it woulda worked as a sisterly dynamic. :3c

• Sentret as resident Team Rocketesque member 2: Balrog, since they have similar childish personalities, and when I saw the ref with Sentret flapping his arms, it sealed the deal for me

• and Kine as the game's nefarious antagonist: the Doctor, who I just wanted an excuse to draw the "leering overlooker with Gendo Ikari's glowing glasses"