- "All that matters is that we're getting paid."
- —Aviva Metula[src]
Aviva Metula, codenamed Shadow Thief, is a mercenary and former Mossad agent.
At some point, Aviva became an agent of Mossad; she then stole a special stealth suit, left Mossad, and became a professional mercenary known as the Shadow Thief. In early 2018, she allied herself with Ricardo Diaz and he introduced Aviva to Laurel Lance. She would some time later depart from Star City to continue her businesses. While originally mostly about thefts she used new connections to up her game to become a terrorist for hire.
Reuniting with Laurel Lance
Shortly after that Laurel Lance's crimes were exposed, she hears that Aviva was back in town and beat some of her bodyguards to make contact again, they started by stealing at least $100.000. They later broke into a facility to steal some diamonds, but Black Canary and White Canary showed up started a fight and they managed to escape. Later they would try to steal a weapon that could kill a lot of people but Sara, Dinah and Felicity Smoak managed to convince Laurel to stop her criminal spree and Aviva than revealed to them that she had been expecting this and other mercenaries appeared and start to shoot at them. She presumably escaped the warehouse before the bomb exploded after the fight.
- "This is Laurel's new gal pal—Aviva Metula, former Mossad agent turned-master thief. She now goes by the name Shadow Thief."
- —Felicity Smoak[src]
- Peak of human physical condition: Aviva is in exceptional physical condition having a well-muscled and conditioned physique, which she maintains and increases through various and extensive training, Aviva's conditioning also lets her recover from most injuries very quickly, though not superhumanly, as she was able to get up barely fazed after being thrown against a wall by, Laurel Lance's sonic scream.
- Expert hand-to-hand combatant/Martial artist: Aviva is proven to be a highly skilled hand-to-hand combatant and martial artist, however, her combat skills are proven to be inferior to master level combatants/martial artists; such as Laurel Lance and Sara Lance respectively. However, despite this, Aviva stood firm against Dinah Drake, a master hand-to-hand combatant and martial artist in her own right, for a time but was eventually bested.
- Expert knife wielder: Aviva has proven lethal skill in using knives and is also accomplished using them in close combat; as seen during her confrontation against Dinah.
- Expert thief: Aviva is a highly skilled thief; renowned for her ability to break in and enter.
- Stealth: Aviva is able to silently move around and effortlessly sneak up on individuals.
- Shadow Thief suit: Aviva wears a suit as her villain alter-ego, Shadow Thief.
- Karambit knives: Aviva is an expert with knives. Using it to silently assassinate security guards. 
Behind the scenes
- In the DC comics universe, Aviva Metula is a former agent of Mossad and the third Shadow Thief.