Apart from the unnamed guards, there are three named ones:
Interactions with the player character
|This character is a temporary companion.|
|This character is a permanent companion.|
|This character is a doctor.|
|This character is a merchant.||Sells: -|
|This character can modify weapons.||
|This character starts quests.||
|This character is involved in quests.||
|This character has a talking head.|
If the Vault Dweller wields any weapon, the guards will tell them to put it away.
Junktown guards appear in the original Fallout.