The game draws a lot of influence from Shadow Hearts in protagonist Matthew’s Fusion ability, Psycho Sigil system, and combination moves.
Battling enemies in a protagonist’s subconscious is something that you had to do in the first Shadow Hearts, but it is unknown if you will have to do that in Penny Blood.
Back in Shadow Hearts Covenant and From the New World, you could line up your characters together and create combo moves.
In a recent interview, scenario writer and game designer Matsuzo Machida shared some information on the combat system and monsters in Penny Blood.