Gruthar

Gruthar was the mighty leader of the intelligent deathclaws of Vault 13 in 2241.

Background
By far the most impressive and strong among his pack, Gruthar was the alpha male and leader. He possessed an uncanny intellect (well, for a lizard at least...) and a deep life philosophy, respecting human life and trying to minimize the impact he and his pack made on their unknowing neighbours. Despite being bred by the Enclave, he harbored disdain for them and had to cope with his conscience, as he took full responsibility for his pack's part in the abduction of the Vault inhabitants.

Goris, a very intelligent silver deathclaw, was his son, privy to his father's doubts and internal struggles.

Gruthar was eventually killed by Frank Horrigan along with the rest of his pack.

Interactions with the player character
Being the leader of the Vault 13 deathclaws, he is the first one to speak to the Chosen One, asking him to not disturb the peace of the Vault. He will also ask for his assistance with the mainframe running the Vault, sabotaged by Matt. In return, he will give the player character the G.E.C.K. he was looking for, unless it was already looted by him/her.

Unfortunately, this also triggers the massacre of Vault 13 inhabitants two weeks after the exchange takes place. There is no way to avert this, short of not talking to Gruthar after fixing the computer.

Restoration Project
In the restoration project the massacre can be averted by killing Dr Schreber in Navarro within two weeks of concluding the quest.

Appearances
Gruthar appears only in Fallout 2.