Welcome to Gaia! ::

Admittedly, all of them have their pros and cons, but I would have to say the worst would be Naraku. After all, you could practically say that all his incarnations are his "children" since he brought them all into the world (like any one of your mothers had done for you). And we've all seen how he's treated them - death by some plan of his. Also, he'd be making you do all sorts of dangerous tasks without telling you everything you need to be prepared, and most likely expecting you to die just so he can "test" something. I can tell you now, if he was your father, this would be practically what your life would be:

Day 1
Naraku: I need you to go to that valley and retrieve the Shikon shard that's there.
You: Sure thing dad. *goes to the valley and seems all the demons* What the fu- *is attacked*
Naraku: By the way, watch out for all the demons that are also after the shard.

Day 2
Naraku: Go to that wolf demon and cut his legs off.
You: Okay. *gets and saw and goes to Kouga* Hey little wolfie, time to play opperation.
Kouga: *uses super speed to catch you off guard and kick your head off*
Naraku: Just be careful of the shards he has inside his legs.

Day 3
Naraku: Find the monk and use this illusion I've put on you to seduce him
You: At least this time I'm only dealing with humans. *goes to Miroku and starts seducing him...successfully*
Sango: Miroku what's all that noise- ....YOU PERVERT! *beats up both you and Miroku*
Naraku: Oh, I should warn you that the monk has an extremely jealous demon slayer around him.
You: Why couldn't you tell me sooner?!

Day 4
Naraku: Go fight with that hanyou.
You: Dad, before I go, is there ANYTHING you should really be telling me NOW before I leave?
Naraku: Nothing much. Only that he has a sword, however it's just a rusty piece of metal.
You: I hope that's all. *goes to fight Inuyasha*
Inuyasha: *pulls out Tessaiga which transforms into a Big F**king Sword* WIND SCAR!
You: It transforms?! Wtf?! Oh holy- *is hit*
Naraku: However it transforms into a deadly weapon the moment he wields it. You shouldn't have left before I finished explaining.

Day 5
Naraku: See that demon lord? I need you to go-
You: NO! Every time I listen to you, you purposely forget to tell me the most important parts, and allow me to get the crap beatened out of me for your own sick pleasure! Well I tell you what, this time, NO! I'm NOT doing your dirty work, AGAIN!
Naraku: All I needed you to do was ask to borrow his shampoo and conditioner. Since you were too "busy" "healing" no one had bought any.
You: Ugh...fine. But that BETTER be all. *goes to see Sesshoumaru* Hey dude, mind lending me some shampoo and conditioner?
Sesshoumaru: No one is allowed to touch this Sesshoumaru's sarced grooming items *kills you before you even had time to understand what he said*
Naraku: Hm, did I forget that Lord Sesshoumaru hates to share?

Day 6
lol I'm kidding, there is no day 6 cause you're already dead! But hey, it was....an interesting five days.