Here's the
OC update. It has laid out the thinking process behind the characters. Dudes and dudettes of MotK, prepare to be assaulted by a thinking pattern utterly different from anything you're familiar with lol (in the Touhousphere, at least).
- As pointed out by ZUN's afterword for SSiB, the Lunar Capital is similar to ancient China in architecture (and clothing, and presumably, social structure).
- SSiB indicates Eirin has powerful political rivals in the Capital.
- It seems jockeying for political power for selfish reasons would create
kegare, so the rivals should have non-selfish motives. For a Chinese-style society, kinship makes for a good motivation.
- If Tsukuyomu, the king of the moon trusts Eirin over his own kin, it makes sense for the princes to worry about an outsider gaining so much power.
- So the OC concept is that after founding the Capital, Tsukuyomu had given the rulership of the Capital to his Princes and Princesses, and appointed Eirin as a supervisor who had more real power than the Princes.
- Not all Princes are Eirin's enemies. However, the two Princes to be introduced have the strongest animosity towards Eirin.
- The Princes are based on other names of Tsukuyomu; the idea is that the legends attributed to Tsukuyomu in history were actually done by different Princes in his name.
1. Prince Tsuku
Symbolizing the
nigi-mitama "harmonious soul" of the four souls, the genderless Prince Tsuku has the highest status among Tsukuyomu's direct offsprings, and is the best regarded by Tsukuyomu.
With intelligence that rivals Eirin, they are responsible for governing the Lunar Capital.
("Tsuku" simply means "the moon".)

2. Prince Sasarae
Symbolizing the
ara-mitama "rude soul" of the four souls, Prince Sasarae is the commander of the Lunar Capital army, above the Wakatsuki sisters.
He was the very person who suspected the Wakatsuki sisters of treason in SSiB.
("Sasarae" means "slender and lovely".
Sasarae-otoko, "the slender and lovely strong man" is a poetic epithet for the moon.)
