Board Thread:Questions and Answers/@comment-31762568-20190817193308/@comment-31479589-20190826161043

Oops, sorry for the spoiler then!

Shadow Mind's story starts at Chapter 6. The first quest of Ch 6 will explain to you a bit about Shadow Mind. Then, his story truly starts, after you defeat the second boss of Ch 6. From there, the story will continue all the way to the final battle of Ch 6, one of the most epic fight in SF3 ever.

Ch 5 has some imortant plot points as well, which might seems unimportant at first, but later will be revealed to be crucial for Ch 7 story.