- "A child mathematical genius, Portnova worked in cryptography before being inducted into KGB Directorate V. Brilliant, deadly, and fanatically loyal to the state, she represents a threat either on or off the battlefield."
- — In-game biography
Yirina Portnova (Russian: Ирина Портнова) is an operator for the Warsaw Pact faction featured in Call of Duty: Black Ops Cold War. She is playable in Multiplayer and Zombies modes within Call of Duty: Black Ops Cold War, as well as in Call of Duty: Warzone upon purchase of Call of Duty: Black Ops Cold War. 
Born in 1955, Yirina Portnova graduated in Applied Mathematics from the Moscow Institute of Electronic Machine Building in 1971 at the age of 16.
Two years later, she was awarded a PhD in Cryptography from the Technical Faculty of the KGB Higher School. It was during this period that she was recruited by the KGB and worked in the Second Chief Directorate, receiving training in counterintelligence and spy craft. In 1976, she received a professorship in Applied Mathematics at the Moscow Mechanical Institute in order to infiltrate, monitor and disrupt dissident circles within the student body.
In 1981, she was one of the first recruits for the newly formed Directorate V of the KGB, a Spetsnaz unit specialized with counterintelligence, assassination of foreign leadership and sabotage of critical enemy infrastructure in the event of war.
|Name||Rarity||Image||How to obtain|
|Bittersweet||Base||In Multiplayer, kill 50 enemies revealed by Scorestreaks, Equipment, or Field Upgrades|
|Dispatch||Rare||Battle Pass Season Six Tier 10|
|Ocean Break||Rare||Operator Mission|
|Red Fever||Rare||Operator Mission|
|Tropic Heat||Rare||Operator Mission|
|Artist||Rare||Battle Pass Season Two Tier 50|
|Tree Hugger||Rare||Operator Mission|
|Safecracker||Rare||Battle Pass Season One Tier 50|
|Assassin||Epic||Battle Pass Season Four Tier 0|
|Plaid Punk||Epic||Operator Mission|
|Blue Beret||Epic||Bundle Kompromat|
|Comrade||Epic||Bundle Iron Sorrow|
|Easter Bunny||Epic||Bundle Hippity Hoppity|
|EOD||Epic||Bundle Bomb Squad|
|Hypersonic||Epic||Bundle Special Ops: Pro Pack|
|Ice Queen||Epic||Bundle Winter Sniper|
|Moving Target||Epic||Bundle Rookie Mistake|
|Rock Show||Epic||Stagehand Bundle|
|Shadow||Epic||Bundle Tracer Pack: Rouge|
|Tactical Goth||Epic||Bundle Dominator|
|Fitness Instructor||Legendary||Bundle Workout Plan|
|Funny Bone||Legendary||Bundle Tracer Pack: Big Joke II|
|Ghost||Legendary||Bundle Hellscream Mastercraft Bundle|
|Killer Bee||Legendary||Bundle Disavowed Assassin|
|Laboratory||Legendary||Tracer Pack: Stoner's Delight III|
|SIGINT||Legendary||Bundle Cyber Space|
|Necro Queen||Ultra||Tracer Pack: Necro Queen Reactive Mastercraft Bundle|
- Portnova's blood type is B-.
- Portnova - is a common Russian surname, which literally means "tailor's daughter".
- Portnova's "Killer Bee" skin bears similar appearance to the character of "The Bride" and her primary outfit from Kill Bill: Volume 1, while the name derives from a quote from Kill Bill: Volume 2.
- Similar to the Clown skin for Baker, the Funny Bone skin for Portnova is a reference to the outfits worn by the Joker's thugs in the film The Dark Knight.