EVA is a remarkably affable entity, known for its tendency to joining humans on their journeys until its interest wanes. Despite its friendly demeanor, EVA remains somewhat aloof, only initiating interactions when approached by others.

What sets EVA apart is its ability to transform its appearance, often assuming the form of someone they're cherished. For those it deems trustworthy, EVA may eventually reveal its true self.

EVA is also open to exchanging transport services only to one person they felt attached. Although it cannot speak, EVA communicates through gestures.