Bishop Ladja is first seen in the Ancient Ruins, blocking a young hero and Prince Harry from escaping, and easily defeats them. When Pankraz arrives, he summons Kon the Knight and Slon the Rook. Threatening to kill his son, Pankraz his forced to stand down and is slain by Ladja with Kafrizzle. He and his minions carry the boys off to Mount Azimuth as slave labor for constructing a temple for the Order of Zugzwang.
He is not seen again until Knightmare Towers, after the hero defeated Kon. He reveals that the hero's wife is of Zenithian bloodline and is destined to bear the legendary hero, so he petrifies both of them to prevent this. Unbeknownst to him, she had already given birth to the legendary hero, who along with his twin sister eventually rescued their father.
The hero and his children eventually encounter Ladja in the Talon Tower, guarding one of the dragon eyes. After a boss battle, he departs. He is seen again in the Crocodilopolis, where he kills off King Korol, who was no longer needed by Nimzo. He is encountered for the last time in Mt. Zugzwang, where the hero and party finally avenge Pankraz's death.