Itassis

A Sphinx monster with eyeglasses and an arm-mounted bazooka in the shape of a lion's head. She's a very skilled hand-to-hand fighter, and her bazooka has immense power. The wisest of the ten and working for the Master in pursuit of knowledge rather than power, Itassis makes sure the other Terrors follow the Rules of Darkness - she was the one who stopped Megahorn from destroying Daggeron in order for him not to disrupt the Rules of Darkness. She also was the one who reversed Hekatoid's spell on Nick and Vida that prevented them from being able to morph so that Serpentina would follow the rules. In Snow Prince, she expressed surprise and concern when Sculpin began to break the Rules of Darkness himself by sending Black Lance to help Megahorn on the surface. Unlike the other Terrors and the Master, Itassis prefers peaceful means to end conflicts and hers is the way of knowledge.

In The Return, Itassis expressed surprise at the situation between Matoombo and the Rangers. After Vida escaped on the Solar Streak, she made a deal with the Rangers to assist them in return for knowledge - the answer to how, though the Terrors were stronger, the Rangers managed to defeat them time after time. The answer given was their courage, which led them to keep fighting for the sake of others, and she expressed confusion over why anyone would fight to defend a weaker being.

When the Master chose Itassis to destroy the Rangers, she displayed great power in easily defeating the team, including Nick as the Red Dragonfire Ranger, but was confronted by Madison and Nick that she was just a puppet of the Master and lacked the courage to make her own decisions. She left the battle, only to be attacked and destroyed by Black Lance and Sculpin. Necrolai, however, revived her, and Itassis ended up destroying Sculpin in battle and returning to the Surface World to aid the Rangers in their fight against the Master. She was last seen asking Daggeron to explain magic and courage to her.