After advancing to a Level 1 Wizard, Ronan's biggest regret was that he could not fully leverage the advantage of mastering two major Extraordinary Magic Domains.
At Hoddam Academy, he chose to specialize in Energy Magic in front of Grace, with the aim of utilizing the [Energy Missile - Particle Torrent] as a trump card to build a stronger magic system around it.
Later, when he arrived at the Silver Magic Ring, all he could think about was joining the Ring, also because the Silver Magic Ring's Metal Magic inheritance and [Charging Weapon - Breaking Magic Power] were a "match made in heaven", allowing the power of this domain to be fully exploited.
Unfortunately, both plans fell apart, and Ronan eventually selected Ice Magic.