You're right, strength and vunerability are difficult to express. In my opinion, it's even more difficult when you're writing it in a story because you have to make sure it hits that proper note, and yeah... it's much easier to be open with your feelings when you're leaving a short comment.
Not a problem! I can't wait to see them again in Heart Sigil Elchemia! By the way, is Heart Sigil Elchemia going to remain free?