Feat: Ever-Vigilant Senses

Your eidolon has enhanced senses. They gain a +2 circumstance bonus to Perception and can't be flanked except by creatures that are higher level than them.

They can see Invisible creatures and objects, which appear translucent and are Concealed.

When your eidolon moves within 30 feet of an illusion that can be disbelieved, the GM rolls a secret check to disbelieve it, even if your eidolon didn't spend an action to Interact.