Freddy Fazbear

Freddy Fazbear is a boss in Slender Fortress.

Description
Freddy Fazbear is the mascot of Freddy Fazbear's Pizza, a family-friendly pizzeria with the entertainment being a show-band composed of three animatronics; Bonnie, Chica, and the lead singer, Freddy. While they love children and act fine during the day, they're locked in a free-roaming mode at night where they view every human as a naked endoskeleton in need of a costume. As such, they forcefully shove said human into the suits, violently mangling them to death. However, it is implied they are in fact haunted by dead children murdered in the restaurant and the aforementioned "endoskeleton bug" is just a coverup.

In Slender Fortress
Freddy always spawns with Bonnie, Chica, Foxy, and Golden Freddy and is a teleporter who will insta-kill the player in a unique death gif if no one is observing him, regardless of distance. While he sounds like a reskin of SCP-173 or the Weeping Angel, blinking doesn't break what Freddy considers observation, making him a very easy boss as all you have to do is look at him until you get out of his sight. However, it is hard to focus on him when being chased by his peers. Interestingly, he is usually lifelessly staring at the ground, however sometimes he's in a threatening pose that makes him look like he's about to pounce the player, like Foxy.

In Medic's Slender Fortress server
As stated above, Freddy is always paired with Bonnie, Chica and Foxy with the exception of Golden Freddy. Freddy is hard to avoid when you are alone, due to his fast speeds that he will directly spawn behind you and even worse, is dying to him. His quick static buildups is the second dangerous thing when encountering Freddy alone since his static builds faster than Slenderman's. Try not to get sandwiched by these four, and thank god Golden Freddy is not added in Medic's.

Trivia

 * Freddy and Villar are the first ever added bosses in Medic's SF server, and thus, the First Server Update was born.
 * Freddy, along with Bonnie, Chica and Foxy are the most disliked bosses in Medic's SF server due to being sandwiched easily by neither these four, and Freddy is the most hardest out of the 4 animatronics.