[when you think about it, it's a little terrifying how many people just kind of know the gem is dangerous to remove... until you realise how much effort it actually is to do compared to literally just hurting them any other way. It's so unheard of that really, Olivine doesn't even know what the catalyst of Sylvain's eyes widening could be. There was... a lot of information there, after all.]

Mm, yes. According to our history, the crystals contained in the altars are the remnants of the God of Klein's kindness, in sending His sons to bring life to our world. Each of the territories cares for the elemental crystal that resides in its respective area, and said territory is shaped by the abundance of that element. [obviously extremely abridged history-slash-theology lesson given, he smiles at the question.]

If you mean the gemstone I bear... I don't know that it has an inherent element. [one would think it would correspond to the territory they came from, or even the color of it, but... well, clan contracts are weird, he supposes. After a moment of consideration (and a few more bites of food), he continues.] I suppose it might be more aligned with water, since I was born in the Water Territory, but... well, it's always just seemed to help me focus essence in general.