Yaqianliu's sister Liuli?
The story with Zaraki Kenpachi?
After death, people leave their bodies behind and become souls, which is essentially the evolution of humans, while ghosts are the evolution of souls.
Liuli has always had her own body, but her soul resides in her younger sister, Yachiliu.
Ruri was born to his parents, who were Quincy.
There is no swastika in Yazen-ryu. The swastika is a sword demon that turns glass into a Zanpakutō, controls three imps, and condenses into a demon.
The swastika of Yazenryu means colored glass...