Since Criminal Case is filled with Loads and Loads of Characters, this page will focus on two groups of people—the main characters in the Grimsborough Police Department (not counting the player character), and supporting characters who show up in more than one case or arc and have also impacted the story in significant ways.
The Grimsborough PD
A detective in the Grimsborough Police Department who is assigned to work with your player character from the start of the game.
Anime Hair / Spiky Hair: His hair actually sticks straight up at the front. In his more realistic picture in the game's start-up loading screen, his hair displays little spikes from front to back.
Bad Liar: In one side-quest, while retrieving a hooker's lost purse, Jones convinces you to go through it to make sure it's really hers. Later, when the woman asks Jones if her purse was searched, he tries to deny it...but she calls him out on lying, while saying that a woman can know when her stuff's been searched.
Big Eater: He especially likes hot dogs, but he'll jump for hamburgers and pastries as well, and he's always eager to attend functions with buffet lines. His appetite is lampshaded in Case 31, during a discussion about the annual Dog Pageant:
Jones: Dog Pageant Day! I've been waiting for this for weeks! They says the buffet is sublime, all the best cooks participate!
Chief King: ...Jones, do you ever think of anything else besides eating?
Deadpan Snarker: Falls into this from time to time. For example, when confronting food critic Tobias Sharp over a bottle of wine the latter refused to pay for during a side-quest in Case 15:
Jones: Mr Sharp, we analyzed your wine. And I'm not in fact surprised you drank the entire bottle...this wine was perfectly good!
Sharp: What are you saying? It's insane! I refuse to pay for a bottle of corked wine!
Jones: Would you rather come with us to the police office? There are some comfortable cells if you need one, but I'm afraid the food isn't great.
Defective Detective: Jones isn't a bad investigator, per se, in spite of your player character's growing skills overshadowing his own at times. However, he reveals at one point that his obsession with his work prompted his ex-wife to suggest he go for therapy, and then she eventually left him because the job was putting incredible strain on their marriage.
Rorschach Reaper:You wouldn't know about being brilliant, would you, Officer Jones? (player's rank and name)'s dog, always following, always praising, always failing...It's unbearable, isn't it? Living in (player's rank and name)'s shadow, being endlessly scolded for failing to meet their standards...So much frustration, Officer Jones...It has to stop, hasn't it? It can't go on forever, it has to stop now. Now and forever. And there's only one thing to do. The right thing.
Staircase Tumble: At the end of Case 41, he gets a head injury resulting from this right before the killer's arrest. Or so he thinks; see Ramirez's entry below.
A Day in the Limelight: Case 48 has Grace accompany your player character in solving the case, since Jones is being kept busy with a multitude of complaints against him for rudeness to Maple Heights residents (and being pulled from the case due to it being too serious for him). Grace gets the chance to wear an outfit very similar to Jones' usual getup.
Heroes Love Dogs: Grace is an animal lover in general, but she especially likes dogs. Consequently, she doesn't react well when she learns that a lost puppy, which you recover during your investigations in a side-quest in Case 6 and which she later adopts, was being trained for dog-fighting.
Grace: They're monsters! Look at how this puppy has been abused already! No wonder it ran away!
Nightmare Fetishist: He sees absolutely nothing wrong with keeping a piranha as a pet. Keep in mind, said piranha was one of a batch that had just eaten a person.
The Profiler: Plays this role in Case 15, while describing how the victim died and what type of person might do it.
Nathan: The interesting thing is, your victim was tied up post-mortem. It's as if the killer wanted to subdue her even more. As if killing her hadn't been enough. You're probably looking for someone who felt humiliated by Aileen. Someone who wanted to regain control over her.
The police chief of the Grimsborough PD, he usually chides Jones while praising your player character's efforts - though he's not above flipping out on both of you.
Badass Grandpa: Starting with the Maple Heights arc, he decides to come out from behind his desk and get back into the field, if only so he can see firsthand what your player character's investigative skills are like. Of course, he couldn't have gotten where he is in the Grimsborough PD by just sitting behind a desk, so...
Benevolent Boss: On a good day. On one occasion, when Ramirez is utterly freaked out at the idea of a ghost haunting the area, King takes Jones' suggestion and sends Ramirez on a brief leave of absence.
By-the-Book Cop: On one occasion, when Jones bitterly admits that the evidence is pointing in an unfavorable direction, King advises him that you have to follow what the evidence says, notwithstanding.
Cool Old Guy: He's not above giving a good-natured wink to show he's especially pleased with your performance.
Da Chief: On a bad day, and usually toward Jones for being "lazy" and for overstepping his bounds as a cop. King's a lot more reasonable to your player character, who he describes as being better able to keep a cool head, though on one occasion he threatens to assign both of you to work under Ramirez if you don't wrap up the case more quickly.
A beat cop with a fairly timid disposition and a rather bad reputation for screwing up.
Agent Mulder: Believes in the existence of ghosts, zombies and monsters of legend.
Beware the Nice Ones: He might be polite to a fault, be constantly nervous about handling rough-looking suspects, and overall be a bumbling cop, but get him sufficiently aggravated and...well, just look at his response to a quarrel between barber Joshua Kempe and customer Curtis Newman over lice on the barber's scissors, in a side-quest in Case 10:
Kempe: I carefully clean my scissors after every client. If Curtis here has got lice, it's definitely not from me and my scissors...
Newman: Don't try that one on me, old man! Lying comes to you as naturally as breathing! Now you better hope your bones are not as weak as your lies!
Ramirez:(thoroughly pissed) EVERYBODY CALM DOWN RIGHT ABOUT NOW!
Butt Monkey: Just about everybody takes him as a verbal punching bag or a convenient target for insults.
Police Are Useless: He's the main reason the Grimsborough PD's cops are looked down on by the populace, usually by way of mishandling forms or other important evidence.
Secret Secret Keeper: Shared with the player character, for the fact that he had to whack Jones on the head with a frying pan to stop him from shooting the player character while under the Rorschach Reaper's mind control. Jones assumes his injury is from falling down some stairs, and neither you nor Ramirez bothers to correct him.
Spanner in the Works: The Rorschach Reaper didn't count on Ramirez whacking a hypnotized Jones with a frying pan to rescue the player character.
Perpetual Frowner: Judge Hall is not one to smile. Considering the city where she works, it's hard to blame her.
Reasonable Authority Figure: She can be very hard on unrepentant or defiant criminals. On the other hand, she's willing to show some leniency if convicts were of previous good character and are truly remorseful about their actions, and if the circumstances of the crime that led them to her courtroom can be reasonably explained in their favor.
Mayor Howard Johnson
The mayor of Grimsborough, he shows up at least once per arc. He gets major focus during the Maple Heights arc, where he's running for re-election.
Cool Old Guy: Yes, his picture here has him winking at you. In context, the wink is when he thinks you're doing a good job.
Permanent Elected Official: One wonders how he's managed to hold on to his job with the number of murders taking place during his tenure...
Sleazy Politician: Has shades of this in Case 21, where he allows General James Marsh to sway him into telling you and Jones to back off from considering Marsh as a suspect in the case's murder, on the grounds that Marsh is a very influential man and it wouldn't be wise to have him as an enemy. Then he pulls it on you again in Cases 31 and 41 where he's primarily worried about the impact that (respectively) cancelling the Dog Pageant due to a murder, and the Rorschach Reaper's serial killings, will have on his chances of being re-elected.
A leading figure in the local Italian mafia, and suspected of involvement in several crimes during the Industrial Area arc.
Arc Villain: Jones sees him as this throughout the Industrial Area arc. He cements it after killing Salvador Cordero, the other contender for the title.
Even Evil Has Standards: Being leader of the mob? Sure. Running a sleazy nightclub? No problem. Killing people who've crossed him? Run-of-the-mill. Beating a woman to death, especially if she's an employee of his? NO.