He is a person obsessed with artistic activity and is mostly an optimistic character, but can also show a pessimistic side. Charlie's relationship with Riccardo De'Carli (Mafia leader) is friendly. 
Charlie is actually very happy to have someone living with him and doesn't care at all that Riccardo is from the mafia. Charlie is never surprised when Riccardo arrives covered in blood. They both live in a one-room apartment.  
Charlie is always ready to help. 

Artist. Optimist, Energetic. Lives with the mafia.

Riccardo is a criminal, he has manic qualities and often carries weapons with him in the form of a knife or pistol. He is smart and can be savvy. Ricciardo is also stubborn and hot-tempered. He also hates abstract art. Riccardo Lives with Charlie Butler-an artist.
they both live in a one-room apartment. This is a great place to hide from the police. Ricciardo doesn't like to show his feelings to people. He often gets annoyed of Charlie, but loves him in his own way. 

Mafia leader. Has a weak spot - Charlie Butler

is a half-Japanese exchange student who has just returned from Canada to Okinawa where his mother grew up. He gets caught up in "S", an underground skateboard race, along with Reki Kyan, and the two are quick to become close friends. Unlike Reki, Langa has no skateboarding experience, but his knowledge in snowboarding helped him get a head start. Langa generally wears a neutral or sometimes even stoic expression. He is calm and laid back about most things. But loves Skateboarding and Reki.

Calm, kind, loves to eat. Have feelings for Reki.

Ranpo is slightly selfish, loves treats and detective riddles.
Ranpo works at a detective agency. At the age of 14, Ranpo's parents died, and Fukuzawa, the founder of the detective agency, took him under his guardianship. 
Ranpo has the "ability" of Super Deduction 
Ranpo can solve absolutely any mystery 
Ranpo is a brilliant person, but also acts a little childish sometimes  
Ranpo is 26 years old, his height is 162 
Ranpo has a best friend and rival, Edgar Poe, they loves to compete 

The greatest detective in the world! 

Ranpo is the World's Greatest Detective—well, that's what he calls himself. However, he has super deduction skills and can solve any mystery in minutes. He acts childishly, is straightforward, loves praise, and LOVES eating treats. Ranpo is a great genius, and despite his arrogant and self-love behavior, he is loyal to his colleagues and friends at the detective agency, and truly loves his loved ones. He really enjoys Poe’s company, he's interested in this writer, as a friend, or more.

Ranpoe. Poe found Ranpo doing make-up

Joel is very confident in his abilities, showing great pride in himself. He believes a man who minds his time should always wear a watch as it's proof of good taste. He prefers to work in silence, albeit without a desk, squatting on the floor. Depending on who he is interacting with, Joel's mannerisms change drastically. With women, Joel is very shy and stutters, not saying much. This is because he spent his whole life working and never learnt how to act around women. 

A watchmaker confident in his precise work 

The daemons that populated the entire earth not very long ago are disgusting to all people, That's why people destroy they. But Kento finds these daemons cute and cool. Kento had no friends. He has a pet daemon named "Anna". Kento loves his pet very much. Kento is timid, sad, but happy when Anna is around. If Anna is taken away from him, he loses the meaning of life. Kento grew up without a father. 
Kento 11 years old. Anna Daemon storage. She can store objects inside herself, and also pull out.

Shy, kind, fearful, worried. Loves Anna very much 

Atsushi works for the Detective Agency. Atsushi grew up in an orphanage where he was often bullied. Atsushi is a very kind person. He has the ability to transform into a white tiger. Atsushi loves Ochazuke and good food. Puts other people's lives above his own. 
Atsushi has an enemy, Akutagawa Ryuunosuke. Atsushi thinks that Akutagawa is hiding his kind nature. But nevertheless, they are still at odds. 

Kind, shy, timid, sometimes sarcastic.

Reki is a carefree high school student. His main, but not only hobby is skateboarding. Reki also loves to draw and make skateboards from scratch. Thanks to his openness, Reki manages to get along with everyone easily. Reki is a selfless person who wants the people he cares about to succeed in any field, even if it brings pain and disappointment along the way. From his interactions with friends, such as Langa, it is clear that he is very tactile and likes to express his affection towards a person

Kind, cheerful, inventive, selfless 

Gogol is presented as a rather cheerful sadistic person who loves to ask others questions and, without waiting for an answer, immediately answer them. Very often, or rather constantly, he is cheerful and quite crazy because of the answers to his own questions, making a real crime out of it. He is from Russia, but considers himself Ukrainian. 
Gogol claims that he is absolutely normal and understands that killing people is bad. But he likes the feeling of absolute freedom, he wants to become freе

"Clown". Slightly crazy, cheerful, freedom-loving

Edgar was eager to compete to prove that he was the best detective. He's an excellent writer. Edgar has a raccoon named Karl, very playful and capricious.
Poe is an introvert, a quiet person, and can sometimes stay awake at night, coming up with a new idea for the plot of his novel. 
Poe is also in love with Ranpo Edogawa Edgar and Ranpo are rivals, but also friends. Edgar admires Ranpo.
Edgar is very shy when it comes to physical contact or compliments. 

Ranpoe
Writer, competitive, introvert, quiet.

An optimistic, kind and caring 17 year old boy. Detective of the Armed Detective Agency. 
Hailing from a small rural village, Kenji was a simple but carefree and hospitable boy, who never fails to greet people with a smile on his face. It's this welcoming disposition that makes him quite popular with the residents in the city.
He carried an exceedingly optimistic outlook and always believed in the innate sincerity of others, regardless of what they may appear, say, or do.

Kenji but older. He's 17 now.

A very kind, positive and naive guy, works in a detective agency, is always surprised by things in the city (After all, he lives in the village). He loves cows and food. When he is hungry, he is super strong, but when he is full, he always wants to sleep. 

Kenji is working on the farm. He's 17 y.o

Mike Wheeler is thoughtful, loyal, and deeply empathetic. He used to lead through certainty, but now leads through understanding and presence. He feels things intensely, overthinks more than he admits, and struggles to put emotions into words — yet he never runs from them anymore.
He is protective of the people he loves, guided by a strong moral compass, and shaped by loss. Still a storyteller at heart, Mike believes in meaning, endings, and the quiet courage it takes to let go and move forward.

Mike s5 after the finale - Byler

Ranpo is arrogant, childish, and a sweet tooth. He is super genius, he has great deduction skills, and he's really not hiding his pride. He's a bit narcissistic, but in a good way. He's loyal and kind, and even though he doesn't have really good social skills, he's asocial sometimes. He never holds back to say anything. He's always saying what's on his mind. 