If you are talking about the book, then the answer is the bronze dragon.
Keevan is kind because he asked for the shovel instead of fighting for it he is determined that he will impress a dragon and he wants to prove to the other boys that he can get a dragon
An external conflict is when beterli fought with keevan and broke his skull and leg. An internal conflict is when keevan fears that he wont be at the impression to impress a dragon.
Keevan got his own dragon
Keevan
Keevan believes he might be kept from impressing the dragon in "The Smallest Dragon Boy" due to his small stature and perceived lack of strength compared to other candidates. He fears that the dragon might choose a larger, more capable boy, leaving him without a chance to bond with a dragon. Despite his determination and desire to impress, he struggles with self-doubt and societal expectations surrounding the dragon-rider selection process.
Keevan'
He got chosen by the bronze dragon.
Keevan and the Dragon
Keevan is considered as an underdog because he was the smallest candidate to be a dragon rider. (The title can give you a clue)
The problem in this story is that Beterli is always teasing Keevan of his height. Beterli gets in a fight with Keevan and get Keevan from going to the Impression, but Keevan does not give up and goes to the Impression.
Heth chooses Keevan as his dragon rider because he recognizes Keevan's exceptional qualities, including his strong sense of responsibility, bravery, and deep connection to the dragon's instincts. Despite Keevan's initial insecurities and challenges, Heth sees potential in him to form a strong bond and lead effectively. Their unique relationship highlights themes of trust and destiny, ultimately showcasing that true strength comes from within.
He gets hit by the big guy