Indiana Type - a loli with a taste for adventure, thrills, and well, pretty much Marisa, except is bolder and has the galls to match her audacity. She also seduces every stage boss in the process.
Kraken Loli - still hoping for it, if not any Greek stuff, we are still missing some gorgons, some hydras, some gryphons, some griffins, elves, maybe even bigfoot.
Despite having a shrinemaiden we have yet to gain an Omyouji (1500~ modern day) type of exorcist, heck, we could use a priest, or a monk (beside Byakuren), or maybe even something akin to a Broken Monk (a monk that has broken at least one of the virtues to bide to the path of enlightenment, like Byakuren, who refused to die, it can any number of things such as eating meat, drinking, or killing)
I suppose a Chaos loli would be nice, think Nvrqsr or Nero, wait till she lifts her skirt and OMG WHAT IS THAT COMING OUTTA YOUR VAJAYJAY?