Tanis "Viper" Blaine is a Huntress and the mother Team CBLT's Seth Blaine. Like her son, Tanis is a Fanus, but in her case, a Viper Fanus, complete with snake-like eyes and tongue. Her weapon of choice is a sniper.
Like her son, Tanis is very tall, for a woman, with pale skin and long dark green hair, which is normally tied in a braid over her right shoulder and yellow-gold snake eyes. As a viper fanus, her traits include the snake eyes, tongue, and teeth.
Tanis is a calm, yet stern woman who shows very little emotion. She does show emotion just not a lot, and it is usually only when Seth is near. She cares very much for her son and does worry when he gets bullied for being a Fanus. She does not tolerate the bullying of Fanus, and will step in to help one. When she is on a mission, her attention is focused on the mission and the mission only.
- Aura: Tanis is able to use Aura, the manifestation of her soul, for various purposes in battle.
- Semblance - Camouflage: Tanis has the power to camouflage into her surroundings. Her semblance was inherited by Seth.
- Shadow camouflage: Tanis is able to become invisible while in shadows.
- Body heat camouflage: Tanis is able to hide her own body heat signature.
- Enhanced agility
- Enhanced lung capacity: As part of her snake Fanus, Tanis can hold his breath for extended periods of time.
- Seismic Sense: Also part of her Snake Fanus, Tanis can sense and perceive vibrations in the earth.
- Combat mastery: Tanis is very skilled in physical combat.
- Sniper proficiency: Tanis is highly skilled in wielding her weapon.
- Expert marksmanship: Tanis is an excellent marksman with her sniper rifle.
- Stealth tactics: As part of her Snake Fanus, Tanis possess extraordinarily expertise in stealth.
- Athleticism: Tanis is highly athletic and fit, capable of holding her own in battle for an extended period of time as well as executing difficult physical maneuvers.
- Cold temperatures: Tanis performs very poorly in cold weather conditions.
- Sniper: Tanis's weapon of choice is a sniper.
- Tanis's snake Fanus is a viper while her son, Seth, is a King Cobra.
- Tanis is a Greek name meaning "serpent lady".