Arthur.
An average boy.
An son of a farmers.
An nobody.
Just a guy.
He was an farmer.
But this isn't bothered Erza.
If anything, she liked the boy.
He was energetic, simple and had wild fantasies.
He was bothersome and annoying sometimes, but didn't bothered Erza at all.
If anything, it made her smile.
She enjoyed the boy presence and before long, she started getting used to him, before then becoming her friend.
He was only 10 years old boy when she met them, while she herself looked like she was in her 18, even though she lived many times longer than him.