Board Thread:Questions and Answers/@comment-2001:978:2305:1E:601:0:0:1-20181021224619/@comment-32601729-20181021234747

I believe that symbol indicates characters that have limit break, but we don't have anything about what the symbol is called or hoe exactly it works. I'm assuming when it glows means that one or more of the character's abilities that it gains from limit break are active.