Warning Contains Spoilers for 5.3....
Well we finally got the
Soul Crystal of our character's original Soul
and it has the Symbol of the Sun on it. There is only two ways this can go and I am guessing the next part of the storyline will have our character finally Awaken their original powers, it becomes a new Job for our character we unlock in 6.0 expansion, or both outcomes.
It will be interesting if it turns out to be the source of a new job but only Job in FF series I know about that uses the Power of the Sun is Rain's Grandshelt Knight Job from FF Brave Exvius. Heck Rain's new Limit Break Extreme Nova for his Neo Vision self uses the power of 1000 suns to nuke a Galaxy and his King Rain version uses the power of a Sun to create Crimson Nova to blast a planet.