So, who do you think Hatsumi should end up with? ^^

Voting more than one time in sequence will void your vote. Voting 3 times in 2 minutes is not going to get you a vote. Voting 3 times in the morning and then 5 in the evening is not going to get you a vote either. Believe me, I can see when it's the same person voting over and over again.
It is ok to change your mind during time about which is your favorite character and come back and vote again, it is not ok to attempt sending lots of votes so your favorite character wins.