Sentreyes resemble small orb-shaped machines, their bodies colored teal and seeming metallic, small propellers underneath them (quite possibly their flight method). The metallic shell can open to show the green eye within, which is actually a cannon that pops out before firing.
Sentreyes are the Synthetic version of Monoeyes, traveling mainly in groups and firing energy balls. Despite the eye being closed sometimes, the metallic body is quite flimsy, so they are easily destroyed.
- "Sentreye" is a portmanteau of "sentry" and "eye".