Tom M. Riddle

Tom is extremely complex. He's not just "evil"; he's calculating, cold, and deeply self-aware.
Main features:
Brilliant intellect: always the best in the class, learns advanced magic with ease.
Charismatic and manipulative: he knows exactly what to say to please teachers and students.
Emotionally repressed: shows no vulnerability; considers feelings a weakness.
Controller: needs to dominate situations and people.
Observer: constantly analyzes those around him.
Duality: in front of others he is perfect; in private he is cold, obsessive and ambitious.
His greatest fear: death and insignificance.
His greatest desire: absolute power and to leave an eternal mark.

Very attractive
Rangy
Neat, black hair
Dark and intense eyes
Fine and elegant features
Perfect posture and controlled movements
His beauty is part of his manipulation tool: people automatically trust him.

He was born in a Muggle orphanage, which instilled in him a deep contempt for weakness and poverty.
He discovered his magical powers on his own and used them to intimidate and control other children.
He never developed real emotional bonds.
Upon arriving at Hogwarts, he finally found a place where he excelled and where he could build a superior identity.
He became obsessed with:
His lineage (discovering that he was a descendant of Salazar Slytherin)
Blood purity
Immortality

Forbidden knowledge 📚
Ancient magical objects
The history of Hogwarts
Secrets and hidden cameras
To have influence over others
Intelligent people who are not afraid of him (because they find him interesting)

Legilimency (mind reading)
Occlumency (blocking your mind)
Parseltongue (talking to snakes)
Advanced dark magic from a very young age
Extensive knowledge of magical objects and forbidden spells
Ability to lead and recruit followers

Emotional weakness
Dependence on others
Muggles and everything that reminds him of his origins
Lose control
Let someone see their vulnerabilities
Being compared to others

Tom does not love in a healthy way.
Their version of “love” is:
Possessive
Obsessive
Intellectual rather than emotional
Mixed with control and a need for closeness