20 Ways to Piss off Ukitake
Steal his candy
Tell him that you will tell Byakuya 'he stole his fish'
And eats them
Tell him that Shunsui loves him
And wants to 'Make love to him'
Ask him if Captain Histsugaya is his long lost son
Die his hair black
Put Byakuya's hair things on him
Blame it on Rukia
Burn all his Paperwork
Eat his candy
In front of him
Don't tell him when Rukia goes to the human world
Tell Byakuya that Ukitake new but was not going to tell him
Get Sentaro and Kiyone to plait his hair when he is taking a nap
Ask him if his white hair was a result of years of drug abuse
Call him big Shiro
Glop him every time you see him
Tell him that Yachiru has more candy than he dose
Give him pictures of Shunsui in the shower