Tennora's parents died during a featherlung epidemic while she was still a child. Unknown to Tennora, her mother was an accomplished rogue before she married into the nobility. She was raised in the North Ward by her father's brother and his wife. Tennora studied magic at the House of Wonders mage academy in Waterdeep but she was dismissed by Master Rhinzen Halnian because he didn't think she had much potential as a mage even though she was capable of casting moderately powerful magic such as the fireball spell.
Tennora lived in an apartment at the God Catcher tenement. One day in 1479 DR, a seemingly crazy woman stood outside the building and ranted all day at Aundra Blacklock, the landlord. Tennora took pity on the woman, who was actually the blue dragon Clytemorrenestrix (Nestrix) who was plaguechanged into a human, and agreed to get her an audience with Aundra. Nestrix asked Aundra to use her sorceress powers to turn her back into a dragon and Aundra agreed if Nestrix would steal a magical mask from a shop in the Trades Ward.
Tennora and Nestrix broke into the shop and took the mask. However, unknown to either of them, the shop was owned by the green dragon Andareunarthex, who tracked them back to Tennora's apartment and kidnapped Nestrix. Tennora was able to rescue Nestrix with the help of the bounty hunter Veron Angalen and they also freed Nazra Mrays' young son. Tennora and Nestrix defeated Andareunarthex in a battle at Nazra's mansion and drove him out of Waterdeep.