Senpai

Occupation
High school student
Basic Data
Species
Human (artificial intelligence)
Age
18 years old[1]
Gender
Male
Eye Color
Light blue
Hair color
Reddish Blonde
State
Deceased
Cause of death
Spirit kills him as he leaves him in Week 6

Ah, a new young lady has arrived in search of true love!
Senpai, Friday Night Funkin'

Senpai is the main antagonist of Week 6. He was an artificial intelligence in the game Hating Simulator, a game Girlfriend played when she was little.

Their main songs are Senpai and Roses.

He appears as a handsome, fair-skinned young man with a constant blush and strawberry-blond hair. He wears a partially tucked-in periwinkle-blue button-down shirt, a loose pink tie, gray jeans held up by a black belt with a silver buckle, and gray shoes. He carries a brown backpack in his right hand over his right shoulder and holds a loose pink microphone in his left hand with his thumb and forefinger. His head glows when he's not singing. Consistent with his origins as a dating sim character, he stands and faces forward in the direction of the player rather than his opponent.

In his second track, his previously happy expression shifts to a more uneasy and threatening look, with the upper part of his face turning purple, shading his eyes. His tie appears folded. He now grips the microphone tightly with his left hand. The sparkles around his head are gone. His forward-looking posture remains the same, but his eyes are now focused directly in Boyfriend's direction, even as he sings.

Long ago, Daddy Dearest forcibly trapped someone within the confines of a dating simulator under unknown circumstances. Now trapped in the game with no hope of escape, he would continue to possess their programming and remain dormant until someone arrived.

The dating sim video game belonged to Girlfriend and she used to play it a lot. While hanging out with Boyfriend, she finds it and decides to play with him. However, they both end up being pushed into the game by Daddy Dearest, likely as another attempt on Boyfriend's life. Soon after, they meet Senpai and he chivalrously challenges Boyfriend for Girlfriend's heart and affections. After being bested, he suddenly breaks character, quickly becoming angry and vulgar.

After losing twice, Senpai is seen writhing before something violently erupts from his face, destroying him. Spirit, the one trapped in the game, eventually emerges in Senpai's place, causing the once bright place of the school grounds to become desolate, deserted, and dark. He reveals that he has been trapped in the game without contact with other humans for so long. Despite this, he reveals that he recognizes Girlfriend and remembers how his father was responsible for his imprisonment. He also states that he is not the only person to have faced this cruel fate at the hands of their father.

With the last song, Spirit plans to win against Boyfriend in a rap battle so that he can take over his and Girlfriend's bodies (and let them take their place within the game in return) to finally escape and get revenge on Daddy Dearest for his and everyone else's suffering. Despite his hostility, he may not be entirely ill-willed towards either Boyfriend or Girlfriend, but simply wants out by any means possible, even if his freedom would result in others suffering the same way he did.

Senpai is:
The first character who does not follow the main art style of the video game, but is portrayed in a 32-bit or pixel style.
The first character to provide an additional layer of lore to the game.
The first antagonist to die.
Senpai's appearance in the Story Mode weekly selection menu shows him on a CRT gaming television connected to a video game console, with a controller and an open game case. This makes him the first character to include additional artwork in his Story Mode character render.
The console itself bears a strong resemblance to a PlayStation, and its controller looks similar to DualShock controllers.
Schoolgirls appear in the background of "Senpai" and "Roses," their facial expressions changing depending on the song. As a fun fact, they are listed as "bgFreaks.png" in the game files.
Senpai is the third character who does not have a "danger" icon in his sprite; the first is Girlfriend, the second is Daddy Dearest, and the fourth is Spirit.
In a live Twitch stream, it was clarified that Senpai is not controlled by Spirit at all and that they are completely separate characters.
Senpai's Week's original idea was a Dragon Quest-style game. Later, it was decided to make it a dating sim instead of fully embracing the romance theme.
Moawling confirmed on Twitter that Senpai was 18 years old.
As shown in a piece of concept art, Senpai was originally going to have heterochromia, as confirmed by PhantomArcade in a Twitter post.
As shown in a tweet from PhantomArcade, one of the references used for Senpai's week aesthetic, as well as their first song, "Senpai", is from the 1994 Japanese dating simulator video game Tokimeki Memorial.