sphinx or elemental of light

Trixus

Summary

Trixus, also Trixius or Tixun, is Benu and Bynx’s brother, one of Attabre’s children, and an elemental of light imprisoned in Ashkellon.

On day-42, the goat-headed sphinx prisoner was identified as Trixus, an elemental of light and Benu’s little brother.
He had four brass rings on each paw inscribed: A Blessing from Attabre, Protector of the Brass city, Salvation to his Children. First of his name 5th of his kind.
A book on Benu, Garadul, and Trixus described them as the last three of Attabre’s children who walk on the earth.
Trixus, Benu, and Garadul are Bynx’s brothers.
Trixus helped create Brass City and helped the tabaxi become industrious and proactive.
He remained under a Slumber version of Imprisonment even after the party opened barriers.
On day-43, the family reunion with Benu, Garadul, and Trixus occurred in Ashkellon; Geldrin released Trixus with a tremor skill.
Trixus said father had put him to sleep, questioned Benu’s absence when his people were in trouble, and may be able to help restore memories or emotions.
On day-56, Trixus was found behind a Barrier with Benu, Garadul, and Bynx in a Grand Towers control-room side area.

Why did Attabre put Trixus to sleep?
Can Trixus restore Emi’s removed emotions, and where are those emotions held?
How does Trixus’s role as one of Attabre’s sphynx children overlap with his elemental-of-light identity and Barrier imprisonment?
Why was Trixus again behind a Barrier at Grand Towers after the Ashkellon release?