Mortal

Mortal, also known as Nathan, is an adventurer who finds himself wrapped up in an epic quest to save all of humanity or something, I don't really know it's kinda confusing. While his real name is Nathaniel (shortened to either Nathan or Nate), he had the name Mortal bestowed upon him by the supreme ultimate God of Stars and Pianos, Deneb, and, well, there's no arguing with a God. Also it's my wiki Mr. Star I can do what I want.

Backstory
Mortal was camping and somehow found himself in a giant tomb filled with Scorpions. He managed to escape them and then he found the Mystical Piano-Sword of Deneb. He then tried to leave the tomb, only to be confronted by Deneb, who noticed his Piano-Sword had been stolen. Deneb saw Mortal as a brave warrior, and so bestowed with the magic name and the strength to combat the evil in the world, manifested into some emo dude who looks like Sephiroth named Harley Yuterio. Deneb also summoned the Mystery Man to attack Mortal but then that was retconned so it never happened.

Epic Quest to save the world I guess
After Mortal and Deneb left the Scorpion Pit, they went to go save the world. They met Mako, the swolest and buffest human on the planet, and she carried their team to victory. There also some guy named Fluff, but then he accidentally got updated out of existence. Legend has it he's back tho. Anyways, Mortal and friends made their way to Eternal Existence and promptly froze to death. However, apparently this is also fixed.

Powers and Abilities
Mortal wields the Star Magiks, decently strong magikal spells that he can use to defeat enemies. He wields Scald, Shard, Lightning, and Torch, which represent Water, Ice, Lightning, and Fire respectively. Mortal also wields the Mystical Piano-Sword of Deneb, and with it he can summon Deneb as a beast, who tears through enemies.

Releveance to the Expanded Universe
Mortal actually met up with Dumb Fidelity and some of their friends once. Cyan Crocomire had a house in the middle of some village (apparently called Aria) where he, Dfi, Jerome, and Rae were all having fun. The Mortal barged in and Jerome demanded that the two parties fight. Mortal and friends on and gained the trust and friendship of the 5 inside. However, something was a little bit off with this bunch. Not only did they turn into monsters when they attacked Mortal and co., but Jerome liked anime, which is really out-of-character for him. Who know's but technically its canon so ha.

Oh yeah there was a 6th guy there too but we don't talk about him. Someone might be listening...