Ethan possesses strong offensive physical skills and a good defence. He is generally reliable but lacks versatility.

Recommended Passive Skills:
-Auto Tanti <50% Max HP - Ethan's HP is generally quite good so this should usually be enough to protect him without having to manually heal him.
-Immunity Beserk - one of the bosses uses Beserk and while it isn't particularly bad for Ethan it does cut him off from say administering a much needed Elixir on someone.

Recommended Command Skills:
None in the demo. I would stick with Attack, Sword Tech, Defend or Escape and Items

Skill System:
Any piece of equipment Ethan can equip will either teach him a skill or raise one of his parameters permanently. To unlock the skill or stat boost all Ethan need do is win 5 battles with that item equipped.
Some enemies have a very powerful defence, using Guard Breaker will break their defences for the rest of battle.
Desperate Assault is high risk high reward, be aware that it scales with your HP. For example: at half health the skill will do 70% more damage than attack.
Dark Attack makes excellent use of Ethan's highish HP, allowing him to conserve ST by using HP instead.

The ATK mods will provide the most useful early stat upgrade for Ethan.