About two days after the devastating passing of acclaimed actor Chadwick Boseman, one of his Black Panther co-stars Danai Gurira, who played Okoye, the head warrior whose job was to protect the king of Wakanda, has broken her silence about the loss of her friend.

In a touching letter that she posted on social media, Gurira revealed the pain that she’s now feeling knowing that Boseman is now gone. Her posts were accompanied by a photo of the two of them, as well as a picture of their chairs on the Black Panther set that had their character names on them.

“How do you honor a king? Reeling from the loss of my colleague, my friend, my brother. Struggling for words,” the actress’ letter started. “Nothing feels adequate. I always marveled at how special Chadwick was. Such a pure hearted, profoundly generous, regal, fun guy. My entire job as Okoye was to respect and protect a king. Honor his leadership. Chadwick made that job profoundly easy. He was the epitome of kindness, elegance, diligence and grace.”

Gurira continued: “On many an occasion I would think how thankful I was that he was the leading man I was working closely with. A true class act. And so perfectly equipped to take on the responsibility of leading the franchise that changed everything for Black representation.”

This touching letter comes a short while after Black Panther director Ryan Coogler wrote one about Boseman of his own. He admitted that it was hurtful for him to come to terms with the fact that the actor was no longer with us in person. “But it is with a heavy heart and a sense of deep gratitude to have ever been in his presence, that I have to reckon with the fact that Chad is an ancestor now. And I know that he will watch over us, until we meet again,” the director wrote.

Take a look at Gurira’s message about Boseman below.