Tanis "Viper" Blaine is a Huntress and the mother Team CBLT's Seth Blaine. Like her son, Tanis is a Faunus, but in her case, a Viper Fanus, complete with snake-like eyes and tongue. Her weapon of choice is a High-Powered Sniper-Guandao (HPSG) called Serpentes.
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 lung capacity: As part of her snake Faunus, 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 Serpentes in its sniper rifle mode.
Guandao proficiency: Tanis is also highly skilled in wielding Serpentes in its gaundao form, which is also the form she uses the most.
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.
Serpentes: Tanis's weapon of choice is a sniper rifle that can transform into a guandao.
Tanis's snake Faunus is a viper while her son, Seth, is a King Cobra.
Tanis is a Greek name meaning "serpent lady", which fits her Faunus heritage.