This is my first time doing this so it's not gonna be that good but if you want you can read it.
What's His/Her name: Matsusuke Hatakeyama
What's His/Her age: 18 (Shrunk)
Is your character a boy or girl: Boy
What's His/Her nationality: Japanese
What type of character is He/She(Main Character, Supporting Character, Comic Relief.etc): A member of the Black Organization but he is betrayed like Haibara.
Is he a good guy or bad guy: Good guy
Is he meant to BREAK Conan down or build him up: Build up
What type of person is He/She(Nerd, Bully, Popular, Nice.etc): Cool, Loud and Funny
Any Special traits(Looks, brains, muscle.etc): A bit of Muscle, Brains and he has a small hidden blade in his right sleeve to protect himself
Does He/She play an instrument? What: No
Would He/She cry in the story? Why: No
What is He/She(Detective, Black Organization Member, FBI, CIA.etc): Black Organization Member
Does He/She have any fears: The Black Organization
Is He/She In love with someone? Who: No
Does He/She HATE someone? Who: Everyone from the black organization except Haibara
Is He/She afraid of someone? Who: The people who were ordered to assassinate him.
Who is His/Her Idol: No one. His research was mainly for making a drug that can make human beings have animal instincts and deadly body attachments (Sharp bones, Strong attack, e.t.c)
Would He/She sacrifice Him/Her-self for someone? Who: No
Does He/She have any special skills?(Martial Arts, Detective Skills.etc)If so What are they: He has a mind like Shinichi and a very clever brain like Generic. He also mastered Karate and is almost as good as Ran
How is He/She relevant to the story: Matsusuke helps Conan in solving cases and helps Haibara in making a cure for the APTX for Shinichi. He also helps Conan in dealing with Ayumi and the rest.
Where is He/She from(If he/she is from Japan what part of Japan): Osaka
How Did He/She meet Conan and the others: He was found on the streets in an alleyway where Conan spotted him. He was taken to Agasa's house where Haibara recognises him. They exchange looks before actually talking to each other. When they talk, they find out more about each other and begin to realize they are all being hunted by The Organization.
Does He/She know Conan's identity? If so how did He/She find out: When he talks to Haibara and Shinichi.
What makes Him/Her stand out in a crowd(the word Nothing can be used as an answer): His funny jokes.
Does He/She die later on in the story? If so how: No
What does He/She look like(Hair Color, Physique, Eye color.etc): This person can run fast and is very skilled in Karate resulting in a fairly good Physique.
Hair Colour: Black
Eye Colour: Green