Isn't it unfair that Miaka has to find her constellations on her own, and in Yui's case her constellations reunited দ্বারা themselves?
That's true. And is due to the differences between the Seiryu's constellations and Suzaku's. It is true that the SHI JIN TENCHI SHO says that the priestess has to find them with her own effort, but in the case of Yui, we could say that it was her energy what brought her constellations together. This could be one of Yui's abilities, but it proof that the power of Seiryu's constellations is huge. It means that their power of feeling the energy of the priestess is...