So is Eridan's strong disbelief in magic, saying it can all be explained by science part of him being a Hope player? It sounds a little Rage-y when he tries to convince other's that science is more true than magic, but that could be part of his Prince role and also his personality in general.

Curiously though, rather than trying to debunk Magic, he attempts to explain it through Science, he’s not open to new ideas or the tearing down of his own, rather he’s applying his own set of ideals to other things so he doesn’t have to value another opinion. Shrouding himself in his belief, and not seeking out the truth, which is, as we know, that Magic absolutely does exist. That sounds Hopey.