Shin Megami Tensei Devil Children : Koori no Sho

A spinoff from the Megami Tensei series, Shin Megami Tensei : Devil Children - Book of Ice is, with its counterpart Book of Fire, a game in which demon-human hybrids called devil children journey from Japan to the demon world, and are joined by talking companion monsters who give them guidance. The player takes the role of one such devil child, and battles against demons; the devil children do not fight directly themselves, however, but have allied demons in their party fight for them. The player can choose to talk to demons instead of fighting them, to try to make them join the player's party, and can increase their allied demons' power by fusing multiple demons with each other.