Maneha: Barbarian, Coastal Aumaua, Rogue
Maneha is the only new companion available in the second part of the White March expansion pack. When you meet her, she will be around 13 experience level, it will partially depend on the level of your main character. It is the strongest available companion (19 Might points). Other statistics suffer from that - none of them is higher than 14 points. She has high Athletics (level 9) and Survival (level 7) but other skills are on very low level. When gaining levels you should add some points to Mechanics which's base level is zero. During the battle you must control the quickly depleting health bar. Equipping Maneha with a good, light armor should help with that.
You will meet this companion in Stalwart Village, near the Abydon Temple (M1,3). She will be standing on the small crossroad on the left from the building. Adding her to the party is very easy - simply speak with her.
Maneha's personal quest is The Burden of Memory. It will activate automatically after she joins you.