His Strength is half of Biran's and his Agility is Kimahri's Agility -8.
Yenke blocks attacks on Biran with Guard only when they are together, and casts White Wind just once when below 25% HP. Otherwise he uses Fire Breath, Aqua Breath and Bulldoze. Biran and Yenke are always in Guard status, which means attacks are weakened as one helps the other. Both use Bulldozer, which switches their position from front to back and vice-versa. If one has used it but not the other, the Guard status means nothing and Kimahri's attacks will do full damage.
If Kimahri is in need of health, he can use Lancet or a Hi-Potions to heal. It's best to use Aqua Breath when Biran and Yenke are together and Fire Breath when they are separate.
Defeating Yenke first causes Biran to cast Berserk on himself, which means Kimahri will not be able to get his Ronso Rages, such as Mighty Guard, if he has not used them yet. Defeating Biran first will cause Yenke to use Haste, and in this state, he will not use White Wind, another valuable ability. It is suggested not to attack just one of them, and allow both of them to use their rages before defeating either, if Kimahri wants to learn them. Rages Yenke has are Fire Breath, Stone Breath, Aqua Breath, and White Wind.
If Kimahri learned Steal (ability from Rikku's path), he can steal useful Lv. 3 Key Spheres from Biran and Yenke, at least five of each. In addition, the player can get a lot of these ones, if customizes an armor with Master Thief ability (using the Pendulums obtained in Remiem Temple), to thereby he can getting always by each successful steal two Lv. 3 Key Sphere.