Passive:

1st: Frog

2nd: Tadpole

3rd: Allay

4th: Chicken

5th: Cat

Reason:

All: Cute.

Neutral (hostile when hit,  naturally hostile with provocation, or when player do the additional way to be provoked):

1st: Iron Golem

2nd: Enderman

3rd: Wolf (untamed)

4th: Dolphin

5th: Bee

Reason:

Iron Golem: I CAN USE HIM TORTURE ILLAGERS!!!!!!!!!

Enderman: His screaming is quite funny and I CAN USE HIM TO SACREFICE ENDERMITES!!!!!!!!!

Wolf: Useful when tamed.

Dolphin: His jump is quite good.

Bee: Cute.

Hostile:

1st: Slime

2nd: Ender Dragon

3rd: Breeze

4th: Shulker

5th: Blaze

Reason:

Slime: I CAN USE HIM TO FEED FROGS!!!!!!!!!

Ender Dragon: Kind of ferocious and great.

Breeze: Reminds me of blaze and I'm very interested.

Shulker: I like him 'sticking' on the walls.

Blaze: Very FIRERY!!!!!!!!!