Can someone remind me what his past life was I can't remember it's been soo long the last time I read

He was a king or something like that. There isn’t really much revealed.

He was a great warrior that was so reliable that they made him king.

TM never really explored his past life. Only now (Season 6) we will find out about his past life. In the novel every chapter of the book 7 started off about a memory of his past life, which accumulates into the end of book 7 and the true beginning of tbate. If you want to get spoiled I could (just lmk)