"Many people believe that maintaining a resurrection shrine and seeing to it that people get a second chance at life is supposed to be an inspirational and ennobling experience. I'm not one of those people."
Lina the Healer has an obviously different look (skin and hair color) compared to Lina the Protector henchman found in the latter parts of the Prophecies campaign. Combined with the fact that the two Linas specialize in different monk attributes, it gives weight to the argument that they are different individuals.
Lina the Protector henchman mentions "standing next to a Resurrection Shrine" all day when spoken to in an outpost. This might give weight to the argument that Lina the Healer and Lina the Protector henchman are, in fact, the same person. However, many other Academy Monks were seen standing next to Resurrection Shrines in pre-Searing Ascalon.