From Golden Sun Universe
One of several Wards seen throughout Dark Dawn.

Little is known about Wards other than that they are an ancient Jenei security system installed to protect artifacts like the Insight Glass and the Alchemy Dynamo. Wards resemble glowing blue mustached faces that pop up on the walls of various ruins. In Golden Sun: Dark Dawn, Matthew and friends encounter Wards several times, once in the ruins under Barai Pond and again in the Alchemy Dynamo. When confronted by someone, a Ward will verify that aforementioned someone is an Adept. When this is confirmed, the Ward gives up whatever it is protecting and vanishes once more. This is how the party receives the Insight Glass and access to the Alchemy Dynamo later in the game.