Thentis

Thentis is a farmer in North Britanny during the time of Ultima V.

Description
When talking with him in the fields, Thentis spoke only little about his work, but steered the conversation towards questions concerning the current state of things in Britannia. After the Avatar repeatedly stated that things were not going well, and gave the password of the Resistance, Thentis revealed himself to be a member.

Thentis excused himself for being so careful, and said to meet the local resistance cell at midnight at the well for more information.

Ultima V: Lazarus
In Ultima V: Lazarus, when the Avatar first met Thentis, he told the hero that he had to work long hours as a farmer. He also briefly talked about how he worked with his companions Joshua, Leof, and Vigil, but provided little extra information about himself. If the Avatar told Thentis that things had changed for the worse under Blackthorn's reign and provided the password for the Resistance, Thentis told the hero to go to the well in Britanny North at midnight.

When the Avatar reached the well at midnight, the hero was inducted into the Britanny North Resistance branch by Vigil, who along with her companions, recalled the tale of the their encounter with the Shadowlords near Stonegate. They told the Avatar how they met Sir Sean of the Lycaeum on the shores of Lost Hope Bay. Sir Sean spoke of how he encountered the daemon Balinor guarding the entrance of Stonegate, and was unable to overcome the creature. Vigil and her companions sought to escort Sir Sean to Stonegate, but on the way were overcome by a feeling of darkness, and shortly after this met with Sutek the mage. Sutek was fleeing Stonegate, closely followed by the Shadowlords. Thentis, Leof, and Joshua chose to try to waylay the Shadowlords while the remaining adventurers fled, but were unsuccessful. The Shadowlords ignored the three men and attacked the fleeing group, with only Sutek, Sir Sean, and Vigil surviving the encounter. After this tale, Thentis interrupted Vigil to tell the Avatar that Sutek had had been in contact with him, and the mage had discovered how to slay the Shadowlords. Sutek asked for the Avatar to meet him on a small island to the south of New Magincia.

After this tale, if the Avatar talked to Vigil's companions, they all told the hero that their leader had been shaken by her experience with the Shadowlords, and was no longer as active against the Oppression, although they all still trusted Vigil's abilities. The hero could choose to waylay this information to Vigil, inspiring her to take an active role against Blackthorn once again.