I'm pretty confident that the guy here is named Flavio Santana, because there's not many other ways to translate the katakana "フラビオ・サンタナ". But the shadow girl here is a little weird.
I can't exactly play the game since it closed down on May 27, 2019, and it looks like it's now a voice drama. However, from what I've seen from the various wikis and news articles on this game, there's this whole power system called the Dynamis/Dunamis, and they basically float behind your guys in the artwork. The MC has a big knight dude, another girl has a wolf (or fox, not sure), a third girl has a little floating panda thing?.
But the weird part about this one is that the commentary includes a name for the Dynamis, as if that's part of the character's title:【フラビオ・サンタナ&デュミナス: レスペト】. Again, I don't know if the Dynamis in-game have names given to them in lore, but as far as I can tell, this is the only artwork that specifically gives a name for the Dynamis power of its user. In this case, that's "レスペト", or "Respeto."
If anyone who's better than me at searching through Japanese Wiki (or who has access to the game/voice drama) has more information, please let me know.