The ancient dragon of Arknights

"Name?"
"Neltharion."
"age?"
"22 is old."
"Race?"
"Waifan."
"Are you sure?" (Why is Vaifan's heart the same as a flame?!)
"determine."
"Um...what position are you planning to take?"
"Too knife."
"I'm sorry, what position does 'tachi' mean?"
"Ah? Don't you have a tachi? A pair of swords will do too."
"...I heard that you graduated from the Royal Victoria College of Guards, right? Then would you like to try out as a Guardsman?"
"Okay, then let's go to Guards."
Ceria has a younger brother, and talking about this younger brother gives her a headache even though he is as hard as diamond.This kid is uneducated and flirts with girls all day long. He always asks her for money. Rhine Life is not her private property!
Hearing that he had made a fortune in Londinium, he even began to be reluctant to return home. For such a rebellious brother, the only way to educate him was with an iron fist.
(This is a story about Vaifan constantly evolving on the continent of Terra and eventually growing into an ancient dragon.)