| Name | Taru Sorano |
| DOB | September 7th |
| Gender | Male |
| Pronouns | He/Him |
| Additional Info | He's in the grown up timeline where he works together with Tantei to solve a case with him. |
| Is Tantei's biggest fan. |
| Name | Shizuko Saihara |
| DOB | February 25th |
| Gender | Female |
| Pronouns | She/Her |
| Additional Info | She's mute, so she usually carries a notebook around to communicate with others if she's going out. But of course, with her brother, she'd just do sign language. |
| Is a shut-in, and homeschooled for most of her life, so she never really had any experience with socializing either way. |
| Name | Ogasa Isao |
| Gender | Male |
| Pronouns | He/Him |
| Crush: | Mitsuki Takeshi |
| Additional Info | Has a huge crush on Mitsuki because she's the one who made the paintings that saved him from all his bad thoughts. |
| He became successful after starting his own painting art account, but Mitsuki's affirmation is the only thing he wants. | |
| On the other hand, Mitsuki is jealous of Ogasa, since he managed to do everything she can only dream of. But she never mention it to Ogasa. |
| Name | Shin Masao |
| Gender | Male |
| Pronouns | He/Him |
| Status: | Deceased |
| Reason of death: | Murdered, blood loss. |
| Additional Info | Was Mitsuki's ex boyfriend. Tantei hates how she still thinks about Shin even after they broke up, and is the reason why she kept rejecting Tantei, so he took the anger out by killing him. |
| Name | Riko Tsubame |
| Gender | Female |
| Pronouns | She/Her |
| Status: | Deceased |
| Reason of death: | Murdered, blood loss. |
| Additional Info | She beat Tantei in a piano contest, and used that to make fun and bully him, lowering his self esteem even more when he was a kid. |
| Now that he had grown and knew better, he just wanted to make her suffer like he did. |
| Name | M |
| Gender | Female |
| Pronouns | She/Her |
| Dating: | Veylan |
| Additional Info | Is obsessed with the idea of being together forever with someone. |
| Likes the feeling of being in control, and every time she feels insecure, she'd take it out on Veylan. |
| Name | Veylan |
| Gender | Male |
| Pronouns | He/Him |
| Dating: | Veylan |
| Additional Info | Devoted his life to M. |
| Ship | Tantei x Mitsuki |
| Trope: | Strangers to more. |
| Yandere x Tsundere. | |
| How they are: | Tantei is deeply obsessed with Mitsuki, and everything he do is for her, and she's the reason why he still exist, he's still breathing, his justice. |
| Mitsuki knows how Tantei feels towards her. It's not very subtle after all. But she likes the attention, and loves how he loves her, so she's never freaked out by anything he does. | |
| She just doesn't tell him she knows, since she doesn't want anything to change between them. | |
| How it started: | Tantei found Mitsuki via her social medias. And for some reason, he's captivated by her, and ended up following her every stream, watching her every move on screen, trying to analyze her. |
| Soon, he developed a parasocial crush, relationship with Mitsuki. Even though he already knew everything Mitsuki would ever say on camera is all fake and for clout, somehow that just made him fall even harder. | |
| And once he saw her with his own eyes, in the flesh, in front of him. There's no going back. |
| Ship | Riawa x Hetaku |
| Trope: | Yandere x Oblivious |
| Doctor x Patient | |
| How they are: | Hetaku is afraid of Riawa, and is held captive by her after trying to break up with her when he thought she was cheating on him. |
| Riawa explained that she had to seduce other men so she could lure her targets and kill them for her job. | |
| And decided Hetaku has know too much, so she cuts off his legs and takes care of him by herself. | |
| How it started: | Hetaku was supposed to be in therapy with another doctor, but apparently, he couldn't make it to the office, so Riawa, "Dr.Kimatsu", covered up for him that day. |
| But from then on, every therapy session Hetaku went to, he'd meet Riawa anyway, so she explained that they had replaced Hetaku's original therapist with her, forever. | |
| Hetaku thought nothing of it, and enjoyed Riawa's presence either way, so he keeps sharing his stories, his opinions, everything about him to her. |
| Ship | Veylan x M |
| Trope: | Yandere x Yandere |
| How they are: | Veylan likes the power dynamic between them, he does not mind being controlled and used at all, as long as M is happy. |
| As for M, she's scared that one day Veylan would leave her, she doesn't want to get "boring". So she proceed to manipulate Veylan, guilt tripping him, making him prove that he loves her whenever she's insecure about it. | |
| Veylan loves it either way, after all, she's his everything, the angel saving him from the world, the only one who could protect him. The only person who would ever know what he wants. | |
| They're both currently 21 and studies in different Colleges. | |
| How it started: | They studied in the same high school, M never knew of his presence that much, until one day she found him drenched in water, backpack being thrown at him, notes getting teared up, and students laughing at him. |
| She thinks he's pathetic at that moment. But decided to help him anyway, making him feel like she's a savior in his life. | |
| Veylan is absolutely infatuated with M from that point forward, following her like a puppy, following her every command, going exactly what she asks of him. | |
| And M gets curious of the lengths he'd go for her. | |
| At first, the relationship was just for fun, M just liked the feeling of being in control, and having basically a servant who would lick the ground she walks on. | |
| But later on, M realizes she actually likes Veylan, and if she loses him, she would lose everything. She realized he meant everything to her. | |
| So she became conscious of her actions, she doesn't want Veylan to get bored of her, she doesn't want anything to change between them. | |
| So whenever she thinks things are falling apart, she tries to spice it up. Arguments, giving him new targets to kill, making him jealous, anything to keep him thinking about her. |
| Ship | Alex x Sarah |
| Trope: | Yandere x Typical girl |
| Asshole x I can stand up for myself girlboss | |
| How they are: | Not currently in a relationship. Alex wants to pursue her, but she likes another person, that she can never be with. |
| Alex hates anything that stands in their way, including Sarah's stubbornness. | |
| How it started: | Sarah helped Alex one day in the College's school fair, and from that day on, all he thinks of is her. |
| Alex was born in a high profile family, so he gets everything his way, so he's not used to hearing rejections. And doesn't like hearing rejection. | |
| Sarah comes from a normal family, with a normal life. Dispute here and there, and she finally moved out, not having to deal with her parents anymore. Sarah has a crush on her English Professor, she hopes they would be able to get together one day, maybe after she graduated. But of course, that's just her dream, and it'll never happen. | |
| After the zombie apocalypse broke out, Sarah has to survive by herself, scavenging for food and doing everything on her own. Until one day, the professor saved her, and brought her back to the base where other college students teamed up. That group includes Alex. | |
| Sarah doesn't really notice or wants to talk to Alex that much, and whenever they do, it's awkward. But she thinks it's just because they're too socially awkward for each other. | |
| Alex just enjoys observing Sarah, that's why he doesn't really say much around her. Cause if he accidentally talked too much... It might scare her off. |