may 31st event: 

Courtesy Name: Bai Haolan (White Chivalrious Orchid) 
Birth Name: Bai Qiu (White Autumn)
Title: Longwang-Jun
Aliases: Librarian Bai, Lao Ye (Caelius, Aurelio, and Castor), Grandpa, Uncle Haolan, Old Man.
Cisgendered Male, Demiual, Demiromantic
Relationship Status: Complicated
Switch
Age: Over 5000 years old (appears to be in his early 30's) 
Occupation: Librarian 
Alignment: None.
Learned Powers: Water Manipulation (specializes in ice manipulation), Blood Manipulation (can only use his own blood)
Natural Powers: Water Immunity, Flight, Breathing Underwater, Venom.

Strengths:
Strongest by a source of water.
Does not feel cold. 
He can temporarily stop himself from bleeding by freezing over his wounds and creating a barrier.
Tough Dragon Hide: Capable of withstanding damage from another Dragon's bite.
Exercises restraint very well.

Weaknesses:
Weak to heat. (fire, hot weather, etc.)
Shifting into his dragon form, the process of it is painful and agonizing.  It is during this process of which makes him the most vulnerable as he will only go into this form as a last resort.
Haolan isn't good with his emotions, he tends to hide his thoughts and his opinions until eventually he can't anymore and it results in him exploding and hurting others more in the process. 

Appearance:

Regal.  Elegant.  Refined.  Keep an eye out for the man veiled in white.  He seems to always be dressed in the pristine white robes of funeral garbs as if he's in constant mourning.  Long black hair trailing down his back ending just beneath his rear, phoenix eyes curved with the slightest brush of rouge at the corner of his eyes.  Sharp canine teeth, tough skin.  He has dark eyes but once in his dragon form, he has pure white eyes. 

Personality:

Quiet and lonesome, Haolan is a dragon who tends to stick to himself.  He hides away inside the library.  Never leaving its premises unless it's for dire circumstances or to visit his god-children.  He's a patient man, slow to anger, and resists temptation with high tolerance towards physical pain.  He's always thinking, never truly speaking what's on his mind as he tends to his hoard of books and knowledge within the peace and quiet of his library.

Bio:

Dating 5000 years back, there was a sea serpent.  A sea serpent born to live its measly life within the depths of the ocean with no significance from the heavens above.  His family called him Bai Qiu, for he was a serpent born within the midst of autumn and colored after the bleach white of the dead.  Since he was young, the sea serpent wished for more than the simple life that was meant for him.  A simple life of an animal unworthy of heaven's recognition. 

"You can't ascend!  You're nothing more than one of many little snakes."

The small serpent did not falter, rather, he pushed through.  Committing himself to good deeds until he found himself upon a particularly cold cave.  It was this cave where the sea serpent spent a good 24 years cultivating within until finally... finally he ascended.  It was a flash of light, an earthquake which shook the heavens and rocked the earth below and emerging from the beam of light was a man.  fair and beautiful.