This is the 631st most frequent Japanese word.
俺
A casual and masculine pronoun for "I" or "me."
Here, '俺' is used as a casual and masculine self-reference, often used by men in informal contexts.
俺は明日東京に行くつもりだ。
I'm planning to go to Tokyo tomorrow.
In this sentence, '俺' is used to indicate possession, showing that 'the friend' belongs to the speaker as a personal friend.
俺の友達がパーティーを開くよ。
My friend is hosting a party.
Here, '俺' conveys a sense of regret or longing, displaying a personal emotional expression.