The gist of the unit on tamashii-fugou is this:

- They can form between any two people who share a strong connection - whether that connection is present now, or will develop in the future.
- All tamashii-fugou start out as blobs of colour, and refine over time into exquisite art.
- This refining process can only happen when each bearer of the tamashii-fugou spend time in contact with each other.
- Someone who already bears a fully developed soulmark, upon gaining a new soulmark, will have an impression of their prior soulmate within it.
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