T7-O1

T7-O1 is an Astromech Droid living during the Cold War and the Second Great Galactic War. His memory banks and quirky behavior however survived his astromech's body which was discarded as junk and would resurface like HK-47 and some of the HK-51 units (including the Hero of Tython's HK-51 during the Clone Wars.

Reactivation
Teeseven's droid carcass would be found in a starship graveyard by Neres Vizsla. Interested in the droid carcass due to Vizsla knowing off the droid's history. He stored the memory banks into a new droid carcass, but with that also activated the behavior of Teeseven, who refused to be ordered around by a Mandalorian. Teeseven recognized the family clan's symbol as a Vizsla. Neres Vizsla attempted to download all the data from the droid but every time Vizsla's men came near Teeseven, Teeseven used his droid carcass to defend himself and deactivated himself. Unknowing how to reactivate himself, Vizsla ordered his men to lock the droid down.