I
Me
pronoun, の adjective
The kanji and the word are exactly the same. That means they share meanings as well!
ぼく
This word uses the same reading as the one you learned with the kanji. I certainly like that and I bet you do too.
僕に任せろ。
Leave it to me.
医者から慰謝料をもらうというダジャレを作ったのは僕だ。
It was I who made the pun, "I get compensation from a doctor."
これは僕の缶珈琲だぞ！
This is my canned coffee!