Identity: 1. The youngest lady of the royal family of the four major families; 2. The world's number one killer! [No gang]; 3. The boss behind the scenes in some stores; 4. A game master.
Personality: Dual personality [one ice and one fire]
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Name: Ling Feier
Age: 18 years old
Gender: Female
Identity: 1. The youngest daughter of the Ling family of the four major families; 2. Computer master; 3. Sanda master.
Personality: Evil and charming.
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Name: Aimelin
Age: 20 years old
Gender: Female
Identity: 1. The daughter of the Jin family; 2. The female boss of the school.
Personality: Pretending to be pure.
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Name: Kim Hyun-soo
Age: 20 years old
Sex: Male
Identity: 1. The eldest young master of the Jin family; 2. President of the school.
Personality: Gentle
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Name: Nangong Che
Age: 19 years old
Sex: Male
Identity: 1. The young master of the underworld; 2. The eldest son of the Nangong family of the four major families.
Personality: cold + domineering.
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Name: Shangguanyu
Age: 19 years old
Sex: Male
Identity: 1. Assistant to the underworld young master; 2. Butler of the Nangong family.
Personality: cold + evil
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Name: Murong Jue
Age: 19 years old
Sex: Male
Identity: 1. The eldest son of the Murong family of the four major families; 2. The future son-in-law of the Ling family.
Personality: Dark + mysterious
[Explanation: The four major families were discovered three years later. That is, the four major families were established when the heroine was sixteen. As for why the hero still goes to school at such an old age, everything will be revealed later in the text]