Kaiden decided to leave the school and get Aya something for her birthday, but he.. didn't want her to know it was from him.. he wasn't doing for himself..
He went inside Zickerna a shop full of ancient goods.. one time Aya and Kai went past there when they where young and she looked at the Katana that sat on the shelf..
she wanted it.. so bad he. just knew it.. and all she had was a bokken, of course she wouldn't be able to use it at school... of course.. but well who knew..
He had money saved up in the bank account for his trip to Kyoria Island Holiday but he used it all to buy the sword.. He hoped it wasn't a horrible mistake..
He knew Aya's locker number.. and decided to just place it inside.. with a note.. saying, "For You"
he walked off worried something bad was gonna happen again.