Den

"He's a good boy. The best, in fact."

- Herobrine Den was Herobrine's demonic pet dog, which traveled with him and was always by his side.

Early Life
Den was born as a normal German Shepherd, however died soon after birth. Den's spirit however, was brought to the underworld and was transformed into an demon. After being sent to the overworld, Den encountered Herobrine, who adopted him and brought him on his travels. Den fought with Herobrine in many battles, fighting with him against SCP-682 and SCP-106.

He eventually travelled to the Underworld with Herobrine, and met Hoodedbrine, who chased the two across the realm and followed them back into the Overworld.

Fighting a Foe
Once returned to the Overworld, Herobrine and Den soon again encountered Hoodedbrine, and engaged in combat with the ghost. However Hoodedbrine gained an advantage against the demons and the two were forced to retreat from the being. The two eventually made their way to Houston, Texas, where they set up several traps inside of a cave for Hoodedbrine. Once he arrived and was damaged by the traps, the two engaged him in combat.

Den fought Hoodedbrine alongside Herobrine, gaining the upper hand against the ghost, and almost defeating him. He was however severely wounded by Hoodedbrine in an attempt to save himself, however was healed after Herobrine defeated Hoodedbrine. The two then returned to traveling the world together.

Personality and Abilities
Den was an all-around intimidating dog, however was a sweetheart with Herobrine. Den was relatively strong, and could crush metal with his bare jaw.