Subject — Whee
Object — Whim
Possessive determiner — Whiz
Possessive pronoun — Whiz
Reflexive — Whimself

Basically, just he/him with a "W" sound instead of a "H" sound and different spelling ^__^

examples:

Whee is really beautiful.
I talked to whim yesterday.
Is this whiz dog?
Whee told me that the house is whiz.
Whee did it all by whimself.

Guide made with the help of pronouns.page