logic driven + middle child
Eoin had basically grown up around marine life and water. His father was always taking him out on his boat when he was working and the boy had grown up more amphibian than human. So imagine how pleased he was when he learned there was a huge lake at Hogwarts. Sure, it wasn't the same as the ocean, but it was good enough for him. So, as soon as he had some time off, Eoin was rushing down towards the lake, shorts on, and a comfortable hoodie keeping his arms warm as he came to a stop right by the edge of the water. Then he was kicking his shoes off, pulling off his socks as well, and wading right in until the water was sloshing around his shins. And there was nothing but a smile on his face as he peered down at the ripples his feet were creating, ending to try and see what interesting water plants he might be able to find, or even any cool fish he could write back and tell his father all about.