Caellach is a ruthless individual with a strong desire to become king, though he possesses some decency. He dislikes the past and wants to abandon it. He ran away from his hometown for unknown reasons and became a mercenary. Now he's one of Grado's Imperial Generals, aiming to finally achieve his dream.

He is disgusted by fellow Imperial Generals Riev and Valter, as his crimes are rooted in pragmatic opportunism, while the latter two are depraved.

From Fire Emblem: The Sacred Stones.