Male protagonist: Li Dou - codename [Potato]
- Age: 27 years old
-Ostensible identity: Delivery boy, down-and-out internet writer, cowardly funny man, often bullied, extremely poor
- True identity: Retired underground boxing "shadow boxer", shady plotter, observation ceiling, grudges must be retaliated
- Personality: Pork-tongued and funny, good at pretending to be stupid, ruthless and steady, scheming against enemies, and having double standards for the heroine
- Combat strength: The ceiling of close combat, good at defeating the strong with the weak, defeating the enemy with one move, able to fight, hide and pretend to be miserable
- Purpose: To hide his identity and live a stable life, to deal with the enemies who caused him to retire, to make money, and to protect Sweet Potatoes
- Catchphrase: "Potato, potato, I can't do it, I can't do it" (pretending to be weak)/"Sweet potato save me" (routine)
Heroine: Fang Gui - codename [Sweet Potato]
- Age: 26 years old
- Superficial identity: Supermarket tally clerk, stingy foodie, confused coward, timid and careful in budgeting
- True identity: Retired fighting gym assistant, black market intelligence dealer, calculating, sinister and vicious, hidden boss
- Personality: Stingy and pragmatic, calm and sinister, profit first, cruel to outsiders, sweet and cruel to potatoes
- Combat strength: Strong leg skills, good at equipment and fighting, strong in anti-reconnaissance, and can fight harder and more steadily than the male protagonist
- Purpose: Conceal your identity and get close to Li Dou, manipulate the potatoes,
