Bohr

Bohr is a protectron, unused $$

Background
Bohr has dialogue that describes assisting Keely with research in Vault 22. He was ordered to wait for her return by Keely before she went down to the lower levels and has been waiting for her return ever since.

Interactions with the player character
Bohr's dialogue gives the Courier the opportunity to ask where Keely is, although he does not know the specific answer. They can also ask what it knows about Vault 22, but it doesn't know the answer to that, either.