Base Number Six.
Quezi looked at the new Mecha in the training area, feeling a rush of excitement, though it was purely psychological since his current body can be said to no longer have any blood in it.
Things like adrenaline rushes have no relation to him now, as he no longer has adrenal glands, those endocrine organs.
Even if he had them, it would be useless because the principle of adrenaline is to increase heart contraction force, causing the blood vessels in the heart, liver, and muscles to expand, and the blood vessels in the skin and mucous membrane to contract, thereby accelerating breathing (providing ample oxygen), quickening heartbeat and blood flow, dilating pupils, offering more energy for physical activity, and making reactions swifter.
Quezi not only lacks adrenal glands but also lacks a heart, liver, muscle blood vessels, and other human organs...