According to me I think that Kai do 爱情 Hilary and she too I can prove my point 由 several reason :-
1) When they met in the 6th episode of V-force Hilary 说 to Tyson to introduce her to Kai.
2) When for the first time they meet Kai was quite which he does never means he want to know about her.
3) When Hilary saw the 照片 of Kai she say him cute.
4) When every one was against Hilary and Tyson tore the page Kai was only one who supported her and accept in his team.
5) In the episode 15th of V-force whe nobody was 展示 her their big-beast she begged every one but touched Kai only.
6) Normally...

After the events of Season 1, Kai decides to retire from beyblading to attend the Whitney Prep School. During his time there, though, he is attacked 由 a mysterious blader, Dunga, and saves a fellow classmate and his admirer, Wyatt, in the process. The intense fight Kai has with this blader rekindles his interest in beyblading and inspires him to return to the Bladebreakers. To his surprise, all of his former team-mates have been attacked 由 mysterious bladers too. These turn out to be the Saint Shields, a group that later reveal their wish to capture the four sacred bit-beasts. Later, Kai...