Ready for a truckload of headcanons for the biggest simp in the dating simulator world? If so, then here we go.

1. Senpai's real name is Satoshi Suzuki. Being the haughty, arrogant schoolboy he is, he doesn't like his real name because he thinks it's boring, so he uses "Senpai" as his nickname after hearing other girls call him that. He likes being called Senpai because he thinks it's cooler and more noble-sounding.

2. Senpai's high school is called Sakura Academy (Sakura Gakuen in Japanese).

3. In his game, Senpai is an honor roll student that gets some of the highest marks out of all the other students in his high school.

4. Even though he has tons of fangirls, he doesn't really care much about them. He thinks they're just freaks with nothing better to do than to drool over him, and tries as best as he can to ignore them.

5. Senpai lives a double-life as a J-Pop idol. During the day, he is a regular schoolboy, but at night, he draws in crowds with his performances and drives girls crazy with his shining vocals.

6. Senpai is completely aware that he is a video game character. Even though he likes being the main protagonist of a dating simulator and enjoys all the attention he gets from pretty girls, he can sometimes get bored of having to be the virtual love interest of the player. He wants to experience new things and explore the world beyond his game. This desire granted him the ability to leave his game and visit other worlds as he pleases, whether it's other video games or the real world. Even though he likes seeing the world beyond his game, he knows he has to go back into it. If he stays out of his game for longer than a few hours, his code will collapse.

Senpai has the ability to teleport himself from one nearby location to another via "glitching". Upon learning to control this ability, Senpai would use it to transport himself out of his game and back into it.

7. Contrary to popular belief, Senpai's game is not actually called "Hating Simulator". It's actually called "Lover's Delight", but a lot of players call it Hating Simulator because most of them are turned off by Senpai's smug behavior when they first play it.

8. Being an AI, Senpai doesn't have blood. Instead, he has binary. Whenever he gets wounded in some way (like having a hole punctured in his pixels), he leaks out binary, which greatly embarrasses him. Luckily, he doesn't feel much pain, and is able to heal himself quickly and easily. Video game characters have extra lives, after all.

9. Being a character from a dating simulator game, Senpai is extremely girl-crazy and his biggest weakness is his love of pretty girls. When he found a way to leave his game, he was amazed at the abundance of beautiful ladies in the real world, which was a huge refresher for him, since normally the only girls he ever sees when in his game are his swooning fangirls (whom he doesn't care very much about). He is a huge flirt and will frequently ogle at girls that he finds very attractive. He has a preference for teenage girls who are high schoolers like him or slightly older (specifically late teens or early twenties). Underaged minors, of course, are an exception, as Senpai does not flirt with girls who are below his age group.

10. Senpai's signature pose involves him flipping his hair and giving a wink and a smile as small bishie sparkles flash around his face.

11. Senpai has a lot of nicknames. For the most part, he likes having his name shortened to "Sen", but some people call him "Simp", because he is always overly desperate for a romantic relationship with a girl and will do anything he can to please the girls that he encounters, but forgets the importance of respecting himself first. He cannot help this habit, however, because he was programmed to flirt with pretty girls. His programming sometimes gets him into a bit of trouble, though, which is why he must be careful when it comes to flirting with beautiful ladies.

12. Senpai is kind of vain and narcissistic, and cares a lot about his looks. He can't stand having his appearance messed up, and tends to freak out if a single pixel of him is out of place. He also hates it when someone ruffles his hair (or at least tries to). That's why he doesn't allow anyone to touch him unless he says so. It kind of makes sense, given that he's an AI human. He refuses to let anyone touch him because it will not only mess up his appearance, but his code as well. He's basically a living embodiment of the phrase "You can look, but you can't touch".

13. Senpai is bilingual, being fluent in both English and Japanese. He normally speaks in the former, and sometimes lapses into the latter, usually when he's mad or excited.

14. Even though Spirit managed to burst out of Senpai's body in the canon game, which killed the latter in the process, he was completely unaware that video game characters have extra lives. Because of this, Senpai was able to come back to life and restore his game back to normal as soon as Boyfriend and Girlfriend left. Spirit tried to escape, by trying to figure out where BF and GF went as they escaped the game, but to no avail. Eventually, he gave up and decided to seal himself up inside of Senpai again, because Senpai's physical form looked almost exactly like the one Spirit lost a long time ago, and he didn't want to enter the real world as a realistically-faced pink spirit creature once he found a way to escape the game. Senpai is completely aware that there's a spirit inside him, and for the most part he is able to keep Spirit under control, but when he becomes extremely stressed, he breaks down and turns into Spirit. Whenever Spirit takes over, Senpai's appearance changes. It looks about the same as his original form, but with a dark red color scheme, and he becomes a lot more glitchy than normal. However, Senpai is able to calm himself down with a little mantra, which involves him saying "I'm too perfect to be angry" over and over until he stops glitching and reverts back to his original form. This prevents him from causing any damage whenever he is experiencing frustration. Sometimes, Spirit will talk to Senpai in his head through a disembodied voice, taunting him and telling him negative things, but Senpai is able to shut Spirit up and cancel his taunts.

15. Senpai has a youthful, boyish voice with a 32-bit sound to it, which suits his pretty boy appearance and the fact that he appears in a 32-bit video game. He has a wide vocal range and is able to fluctuate the pitch and tone of his voice whenever he sings. That means his voice can go from a higher pitch in some songs to a lower pitch in others. Likewise, Spirit has the same youthful voice that Senpai has, both when he speaks and when he sings, except his voice is lower in pitch and slightly distorted-sounding.

16. Senpai has been secretly dating Monika ever since she transferred to his game after being deleted from her own. He has quite a close bond with her and relates to her struggles with being a sentient video game character. Senpai is usually there to comfort Monika when she remembers her past mistakes. They both have the ability to travel to different worlds beyond their game, just as long as they don't remain outside their game for too long. Senpai showed Monika how to "glitch" out of the game and back into it, and Monika showed Senpai her incredible fourth wall-breaking and reality-bending skills. Senpai tried breaking the fourth wall a few times, but he's not very good at it because he hasn't fully learned the skill yet. Senpai and Monika make a pretty good pair, but Senpai's fangirls hate Monika because they think she's taking Senpai away from them. Luckily, Monika knows how to deal with those jealous fangirls. Whenever she catches them surrounding Senpai and trying to nab him for themselves, she makes sure to drive them away to keep her boyfriend safe. Senpai and Monika share their mutual interests with one another. Senpai taught Monika some of his songs, and asked her if she would be willing to use her poetry-writing skills to help him come up with some new song lyrics. Of course, she agreed, because she knew poetry and music go hand in hand. Senpai likes it when Monika helps him write lyrics for his songs, because he thinks they're very creative and express sincere thoughts and emotions. In turn, Monika has taught Senpai how to write poetry of his own. When she learned he actually wrote some love poems for her, she was touched. She told him they were very heartwarming and truthful, and she rewarded him with a gentle kiss on the cheek. Senpai realized that he should do stuff like writing poetry more often, because it made him feel good.

17. After exploring the real world, Senpai has developed some knowledge about the different people inhabiting it. He's met some people who are victims of Daddy Dearest's evildoings just like him and has made some pretty good friends with them, such as Tabi, A.G.O.T.I., and Whitty. He's even formed an organization with them called The Anti-Daddy Dearest Force. Together, they plot revenge against the demonic ex-rockstar to make him pay for what he has done to them. When they're not busy thinking of ways to get rid of Daddy Dearest, they talk about the problems they've been facing and give each other a bit of advice from their own experiences. It's kind of like group therapy, in some way.

18. Before Senpai/Spirit was trapped in the video game he currently resides in, he was one of Girlfriend's ex-boyfriends, and his name was Jacob Samuel Hart, or just "Jake" for short. Girlfriend dated Jake some time before she started dating Boyfriend. Jake was obsessed with anime, manga, and video games (especially the ones that involved teen romance). He was also a talented singer who uploaded covers of songs on YouTube (most of them were either anime songs or romantic pop songs). Since he loved anime and manga so much and had a desire to become super popular, a lot of people called him a "weeaboo", a "freak", and an "attention-seeker", which annoyed him to the point where if someone insulted him for his passions, he threatened to punch them in the face. Even though he seemed kind of cute and hospitable at first glance, he was actually a smug brat with a crude mouth. Even though he dated Girlfriend, he didn't treat her right and only used her for his own personal gain. The reason Daddy Dearest sealed Jake into Lover's Delight was because he played Girlfriend without her even realizing it, and said some truly outrageous things. Dad figured that if Jake was going to act like life was a game, he decided to punish the boy by giving him a game. To say the very least, it was not a wise move, but certainly a bit more of a justifiable one. Men who only used Girlfriend for their benefit like Jake did caused Daddy Dearest to grow wary, which is why he isn't too accepting of his daughter dating her current boyfriend yet.

19. Girlfriend didn't mind it when Daddy Dearest banished Jake. He was a bit possessive around her, and it made her feel uncomfortable. She sort of missed him when he was gone, but she felt relieved because she was free to live her life again without some crazy, manipulative boy breathing down her neck.

20. Before he became Senpai/Spirit, Jake's appearance was much different than it currently is. He had the same strawberry blonde hair that Senpai has, but also had heterochromia, meaning that his eyes were different colors. His left eye was green and his right eye was blue. He also wore small black earrings on each ear and had a small, pointy fang-like tooth in his mouth. After he became Senpai/Spirit, both of his eyes became blue. Although they aren't seen when he's in his pixelated game form, Senpai still wears the little black studs on his ears and retains his fang.

21. Before he became Senpai, Jake got his ears pierced during his freshman year in high school because he thought it would make him look cooler and more attractive to girls. Even though he was sometimes teased about it, he wasn't ashamed of his fang, because he thought it made his smile look a lot more charming than anyone else's. He also used it during intimate moments with Girlfriend. He sometimes liked to gently bite on her neck or nibble on her ears, using his fang to gently graze on the skin. Girlfriend didn't seem to mind, though, and thought it felt kind of nice. After all, she's a demon, which means she has little fangs in her mouth as well. But when Jake wasn't trying to get intimate with Girlfriend, he would sometimes use his fang as a lethal weapon. During times where he got into fights with other guys, he would bite his opponent on the arm, and his fang would usually leave a small mark or bruise on the skin, which would stay there for a few days or weeks, depending on how hard his bite was. Jake's habit of biting people that made him angry was one of the reasons he got in trouble with Daddy Dearest and sealed away in the game. During an argument the two of them had after Dad found out about Jake's toxic relationship with his daughter, the boy bit the demonic ex-rockstar's arm as hard as he could. Unfortunately, since DD is a demon, his skin was too tough for Jake's fang to actually go through. Since demons don't usually feel a lot of pain, Dad became even more annoyed with Jake than he was before, and decided that the boy should be punished dearly for his actions.

22. Before he became Senpai, Jake had a habit of comparing himself to other people who looked and/or acted almost exactly like him.

23. All in all, Senpai is a charming individual, but harbors some secrets and a dark side that he tries hard not to reveal. But he has Monika and his friends from the Anti-Daddy Dearest Force, who act as his confidants and emotional relief, and he now works toward a goal he puts his all towards.