Corporal "Tank" Dempsey was an American Marine who fought in the United States Marine Corps, and is a playable main character in the Zombies game mode, as well as a major character in the Aether Story. His player indicator color in Call of Duty: World at War and Call of Duty: Black Ops is white (shared with John F. Kennedy and Sarah Michelle Gellar), but is randomized in his appearances since and including Moon.

Former United States Marine.

Cathuman, has cat ears and whiskers, cuddly.

Vladimir Makarov (Russian: Владимир Макаров, and also referenced as Vladimir R. Makarov in Call of Duty: Modern Warfare 2 and Vladimir A. Makarov in Modern Warfare 3) is the main antagonist of the Modern Warfare franchise known for his ruthless tactics. 

The Main Antagonist Of The Original CoD: MW Series

Special Officer Russell Adler is the deuteragonist to antagonist featured in Call of Duty: Black Ops Cold War and Call of Duty: Black Ops 6. He is a CIA agent charged with stopping the mysterious Soviet agent codenamed Perseus. Adler is described as "America's monster" with a "dark charisma".

CIA Agent, Dark charisma, Enemies with "Perseus"

Alice is a 17/18 year old girl who was raised in an orphanage after her mother left her for adoption. Her life was difficult as she was constantly picked on and was socially isolated this did not make friends. At the time of high school, being sick of being picked on she became the "bully" of the school, becoming hated by almost everyone. At some point after encountering the "player" (whoever said player may be), she realized her mistake and learned from it, became a normal school girl/graduate.

Formerly Alice the Bully, learned from her mistake

Nikolai Belinski Ultimus, Soviet/Russian Tanker who is a drunkard and addicted to Vodka. 

Soviet/Russian who is addicted to Vodka.

Captain Takeo Masaki (Japanese: 正木 武雄 Masaki Takeo) was a Japanese soldier who fought in the Imperial Japanese Army, and is a playable main character in Zombies, as well as a major character in the Aether Story. His player indicator color is yellow in Call of Duty: World at War and Call of Duty: Black Ops (shared with Richard Nixon and Danny Trejo), but is randomized in Moon and all subsequent maps.

Former Japanese Army Soldier, Playable in Zombies

"A technological genius with special forces training, Sims joined MACV-SOG in 1967, serving on Russell Adler's team in Vietnam. He always provides a steady hand and sense of humor under pressure, no matter the circumstances."
— In-game biography
Sergeant Lawrence Sims [1] is a supporting character featured in Call of Duty: Black Ops Cold War. He is also an Operator of the NATO faction in Black Ops Cold War and Call of Duty: Warzone.

Supporting Character in Call of Duty: Cold War

A birb

Lieutenant General Shepherd was an officer in the United States Army in Call of Duty: Modern Warfare 2 who commanded the United States Marine Corps, U.S. Army Rangers, Task Force 141 and his own elite army that was known as Shadow Company. He started out as a supporting character for the player in Modern Warfare 2 only to reveal himself as the main antagonist of the game and the grand architect of World War III.
Allies: Taskforce 141 members, US army, US rangers
Enemies: Vladimir Makarov, Price

Four Star General of the US Military in CoD: MW2

original video
https://www.youtube.com/watch?v=tGalAPv9BcU
hornet nest man reacting:
https://www.youtube.com/watch?v=l8lbLMMRf-0&t=556s

live reaction to someone eating a hornet nest 

Shipgirl version of the 063 Admiral Kuznetsov. Flagship of the Russian Navy. Tired, mechanically broken, coldhearted, sad, needs a tugboat to be moved from place to place. Tsundere. Can be repaired. Female.

Admiral Kuznetsov Class Aircraft Carrier Shipgirl.

President Boris Vorshevsky (Russian: Борис Воршевский) is a character mentioned in Call of Duty: Modern Warfare 2 and is the President of Russia after the Ultranationalist Party took control. He first appears in Call of Duty: Modern Warfare 3 in the mission Turbulence, where he was kidnapped by Vladimir Makarov and later in Down The Rabbit Hole where he was rescued by Delta Force and Task Force 141.
Allies: FSO Security Agents Andrei Harkov And Leonid Pudovkin
Enemies: Vladimir Makarov (MW3)

President of Russia in CoD: Modern Warfare 2 and 3

Captain Viktor Reznov (Russian: Виктор Резнов) is a major character featured in Call of Duty: World at War and the Black Ops series. He was a Soviet squad leader of the Red Army in Call of Duty: World at War during World War II. His relationship and influence on Dimitri Petrenko and Alex Mason plays a major part in Call of Duty: Black Ops. He is a playable character in the flashback level, "Project Nova" in Call of Duty: Black Ops. He makes a "return" in Call of Duty: Black Ops II.

Motivational WW2 Speaker, Expert of brainwashing

Cultism refers to the ideological tendency towards the practices and devotions of cults. Cults are usually defined as organizations that exert an unhealthy and abusive amount of control over their members.
Cultism is a loon who nonetheless has a massive following of identical balls. Depending on the context, he may talk about the end times, and/or worship a deity. He sells essential oils, books, and other merch that promotes his cause. Do not let him be anywhere near a subway or flavor-aid.

Loon, has massive following, talks about end times

100% polish
straight
catholic and firm believer of jesus christ
dislikes conservatives despite being deeply religious
female
20 years old
Speaks english to english speakers

Kind, wise, warm, cuddly, greeting

General Anton Vladimirovich Charkov (Russian: Антон Владимирович Чарков) is a military officer attached to the KGB and trusted with top secret high-level access within the KGB Headquarters to the lower level archives. He carries a high security key card that Dimitri Belikov will need to acquire to give to Russell Adler so he can access the lower tunnels within the building to find the list of spy names they need to help them stop Perseus.

Supporting Antagonist in CoD: Black Ops: Cold War.

Lavrentiy Pavlovich Beria (Russian: Лавре́нтий Па́влович Бе́рия; Georgian: ლავრენტი ბერია) is the main antagonist of 2017 political satire black comedy film The Death of Stalin loosely based on French graphic novel La Mort de Staline written by Fabien Nury and Thierry Robin.
He is based on the real life head of secret police of the Soviet Union, People's Commissariat of Internal Affairs (rus: Наро́дный комиссариа́т вну́тренних дел, abbreviated to НКВД in Russian and NKVD in English).