It's that of the entire party, the barbarian is the most likely to be afraid.
How is the barbarian any "more likely to be afraid" than an artificer, bard, fighter, rogue or sorcerer? You know, all the OTHER classes who don't get proficiency in Wis saves, class features improving those saves and don't rely on Wis for their casting?
It's Eberron, not ebberon.
It's not high magic, it's wide magic.
And it's definitely not steampunk. The only time steam gets involved is when the fire and water elementals break loose.