Shadowverse

Perhaps, there are fewer competitors in the Blood faction.

And why would you put Zoe in the Blood faction? She clearly has a dragon theme, so it would be strange to assign her to another faction. At most, and only if you really wanted to, you could put her in Haven, but definitely not in Blood.

Yes, give the wife to someone else, and give the Blood faction the best husband.

It will almost certainly be Naru.