Rong Ruo

Rong Ruo is a girl who has a masculine build creating much confusion for those who do not know of her gender. Her habit to dress in male clothes does not help to clarify the situation at all.

She is affiliated with the dark energy and seems to carry a secret that might be connected with the Spirit Soul Race.

She blew herself up to protect Fei Yan from one of the Top 10 Experts in the Upper Realms.

His soul got taken by one of the 4 Knights of Destruction and got implanted into a Human Flesh Puppet. (ch2996)

The people of the Spirit Soul Race have a primary and secondary soul. Rong Ruo should've lost her secondary soul (the male soul) when she was younger, but when she saw her family get slaughtered in front of her eyes, the primary soul fell into shock and became dormant. The secondary soul took over (hence her male looks despite being a female) and is the Rong Ruo Jun Wu Xie and the others are familiar with. To save Fei Yan, her female soul presented itself and exploded (presumably out of love) and the male soul got taken by a Knight of Destruction (Su Ruiying). Su Ruiying then turned the male soul into the Human Flesh Puppet (ch2995/6).

From now on, Rong Ruo should be addressed as "he" because the only soul in his body now is male.