“	Winston, this is Osei. What are you doing? Any Overwatch activity is unsanctioned. You are breaking multiple international laws and the consequences will be severe and I can't...I know things are bad. Numbani, Busan, Toronto, the whole world is on fire. But you can't just go gallivanting on your own with your...buddies. This is your last warning from the United Nations. Do not make an enemy out of me.	„
	~ Osei's warning

Osei is the secretary-general of the United Nations.

After Null Sector's attack on Paris and Overwatch's intervention, she sent a message to Winston. She reminded him that he and his "buddies" were in breach of numerous international laws, and as grim as the situation was, this was the only warning he would receive. She advised him not to make her his enemy.^[1]

Trivia

Osei is a name of Ghanaian origin.

References