What character is the best to use with Holy Spear in Underground Castle 2?

The Holy Gunman.

Of course the Holy Lancer uses the Holy Spear, which deals 10 damage bonus to humanoids.

"Underground Castle 2: Dark Awakening" is a business simulation and dungeon exploration game. The main gameplay of Underground Castle 2 is map after chapter. Each map has endless elements for players to explore, and there are many puzzles hidden in it.