Why Yensid's compassionate aspect was in control when they faced Myrmidon
When the spirits merge together to form Yensid, it appears that the compassionate aspect is in control, despite them all being supposedly parts of the original's soul. I have a theory that this is because of the different paths they walked through (un)life. While most of them never really grew beyond what they originally were, aspects of a powerhungry madman, the compassionate aspect spent the millenia building relationships, teaching apprentices, and overall growing as a person. We see that he clearly has changed a lot from the spirit who suggested a way for them to continue their conquest, to a peaceful hermit in present day. This character development leads to him becoming a complete person, whereas the other aspects never became more than soul fragments.