Board Thread:Off Topic/@comment-27425734-20180301024049/@comment-10380701-20180620165841

I'd like to point out that real life Chi, which most of your examples are based on is not similar to how Chi in fictionland works.

Chi in fictionland is often turned into a spiritual energy source, which allows you to do superhuman feats. Thus why most of your examples grant increased strength/durability and myriads of fancy superpowers.

As a concept Aura operates closer to an MP reserve that also doubles as your protective barrier. Advanced aura techniques appear to allow you to focus them on your hands like how Ren does it.

Thus, I don't think there's a direct connection between one's life force and soul. Penny's technically not alive but she has a soul.