The overseer's palm pressed onto Eiro's chest. It pressed onto the cloth of the clothes he was wearing first, but then simply passed through and moved on to the demon's skin, as if the fabric didn't even exist. Similarly, the overseer's hand soon passed through Eiro's skin, and flesh, and passed on to the core in the place where his heart should be.
It was uncomfortable, but not painful. It was like having something wriggle inside of you, carefully pushing parts of flesh to the sides and sinews of muscle that wrapped around it. The overseer stretched their mana out and let it flow into the spirit gateway. This part was honestly even more uncomfortable than their hand moving through Eiro's physical body; they were touching Eiro's soul, even if just briefly.
A few moments after they did, the overseer pulled their hand back, almost as though they were flinching. When they did, they placed their hand onto their own chest, dropping down onto one knee to bow to Eiro.