<p>The creators, and outside sources have confirmed that Senna is in fact a Waterbender. However, we never see Senna use her abilities. We never see her in combat alongside her husband and never see her utilize her abilities whatsoever. However, there are hints that Senna is a healer. In Book 2 we see her at the Healing Hut in the Compound in B2C12. Korra even tells Asami to take Tonraq upon being injured to Senna, not Katara, implying she is in fact a healer. Her exact words are "You're too hurt, you need a healer. Asami, you take my dad on Oogi to my mom." This should be evidence enough that Senna is a healer. Senna also seems to ork very closely with Katara which would mean she is avery good healer as well. However, why did Senna not heal her daughter after being poisoned by the Red Lotus? Definately leave some thoughts below. </p>