A dissonance exists between Jewel and Hyōgō outside of battle. Combat and training allow Jewel to vent her energy, but they fail to satisfy her zanpakuto spirit. Hyōgō burns with a rage that demands worldly destruction, while Jewel denies the spirit and forges her own way. Being out of sync with Hyōgō results in her icing out some of Jewel's senses as well as nervous system.
Jewel suffers with a zanpakuto induced Pan-Hypoesthesia, or a partial loss of multiple senses at once—including a blunted reikaku, which contributes to an extra spiritual sensory block. Jewel’s sense of taste, touch, and smell are also affected. Hyō's effects function like a frosty buffer. Taste, touch, and smell can resurface if the sensation is strong and consistent enough.
Jewel keeps a positive outlook despite her condition. Pain has to punch through the cold veil for her to register it. Rotting maws aren't enough to stop her swing. Blood doesn't have a flavor. It's only warm.
Jewel eventually concedes (after trying for centuries to control her weapon on her own) and seeks a reiatsu suppressor in TYBW to mute the sensory-dulling feedback of her zanpakuto. Akon’s engineering savvy coupled with Isane’s medical notes created a number of suppressors, all of which were destroyed by Jewel’s daily use, typically during combat.
The current build came to be with Jewel’s artistic assistance. Woven from reishi twine, the suppressor is styled as a choker ringed with small black seki-seki spikes. The spikes act as lightning rods for spiritual energy, venting excess reiatsu away from her nervous system. Twisting any spike adjusts internal valves to control the flow of reiatsu. The exterior fabric is intentionally tattered to mask the underlying flexible, blast-resistant plating. Naturally, the choker goes unseen underneath the collar of her top.
While wearing the suppressor, Jewel is able to perceive all of her senses, though her reikaku is still considerably weak. Hyōgō despises Jewel's use of any object that hinders free reign, and terrorizes her through nightmares because of it. Jewel might be able to sleep in a bed without coating the whole room in frost while wearing the suppressor, but she rarely sleeps well.