Sir Bertrand Lamprey was a Lamprey.
When his children accidentally entered N-Space, he searched for them. Over time, he forgot his true nature and thought he was human. He met and married Elspeth, and they had a daughter, Helen. Sir Bertrand's assumption of humanity was so complete that he could not save Elspeth from the fire that destroyed their home.
Years later, Monica Lamprey found him. To prevent him from interfering with her plans, she tricked Rummas into putting him in the Spiral Chamber, which killed him. (PROSE: Spiral Scratch)