Lina

Lina is an aquamarine female dog (formally believed to be a bear until Yin Yang You!) whom is Yang's crush and Yin's best friend.She lives on a farm with her father. She is an intelligent, pretty, yet short-tempered and sassy farm girl first introduced in "Beetlemania" where Yang lied about being a Woo Foo Warrior to impress her, but his plan backfired after he had to fight a giant steel beetle; however, Yin was able to get Yang to tell the truth.

In "The Yin of Yang" she shows slight feelings for Yang after he tried to act like Yin in order to impress her. In "Smoke and Mirrors" she actually tried to pursue him though she was constantly interrupted by both Yin and Yang. As of Gone-A-Fowl, she and Yang exchange their secret feelings for each other and begin pursuing a relationship.

She is now a part of Yin and Yang's Woo Foo Army as the second-in-command, though she is still marked as a Woo Foo Knight in a Little Less Training. Lina's species was unknown until the episode "Yin Yang You!", which reveals that she is a dog.

Abilities
Lina has been trained in the Mighty Style of Woo Foo. She can use the Paws of Power, and she has her own Bamboo Sword (first seen when she and the others turned evil by Eradicus). Her paws of power do not have a glow

Trivia

 * At the near end of the episode, Beetlemania, Lina ditches Yang; but in Gone-A-Fowl, it is revealed that she likes Yang a lot.
 * In A Bad Case of the Buglies, according to Lina herself, she wears contact lenses.
 * Lina still sleeps with her baby blanket as mentioned in Dummy Up
 * Some fans will mistakenly mispell Lina's name as Lena, due to the pronunciation.
 * Like a dog, Lina has ears but doesn't have a nose or tail.

Lina may have get her bamboo sword by Ha-Woo-Chris-Nah-Kah-Mas.