Roland immediately recognizes this passionate spiel, not because he actually comprehends Senku completely, but because he knows what it's like to like something so much that you can't help but tell other people about it. It's that look in a person's eyes, lighting up from the inside; a subject or a skill that adds significance and value to who they were.

Today he sees the same spark of energy in a kindred spirit, and Roland resonates with people who know what they love in life most of all. So he listens with a smirk forming on his face, trying his best to keep up with every term Senku drops his way. He mentions the Mohs scale a lot, and it seemed like a good place to start when the boy holds up the shell, its smooth sheen bouncing sunlight off.

"I'm glad you're liking the collection," he says with just a tinge of amusement. "So tell me, what's the Mohs scale and why is it your default standard of measurement when you check for quality and property?"