Marine Halters

Marine Halters is a soldier onboard the Lady Mehley, the boat that runs between Theramore Isle and Menethil Harbor. Halters is a member of the Theramore Marines, and was assumed to be onboard for the protection of the crew. However, he along with Anderson were assigned to guard the passengers as it's felt the ship goes to Theramore enough.

Although he can be attacked, he will not strike the first blow.

Quotes
The Lady Mehley is in Theramore enough that we've been assigned to guard her passengers.
 * Gossip