Tenda

The Tenda tribe resides hidden away in Tenda Village and Deep Darkness. There are two separate tribes, separated due to the Tendas living in Tenda Village's shyness. Ness then gives the Tenda Village's leader the Overcoming Shyness book. Once the Tenda Village's leader reads it to the rest of the Tenda, he also gives Ness some Tendakraut as thanks for solving their shyness problem. They also assist Ness in getting to the Lost Underworld. Sometime after the events of EarthBound, the two tribes then reunite.

Trivia
If Ness talks to the Tenda tribe's leader again after he reads the book to the entire tribe, he gives him a Bag of Dragonite.