High Summoner Galatea:
This trial tests for the talents to become a Summoner. The method is very simple. You must seek out and battle many other Summoners. Achieve victory against 6 opponents and you will be able to pass the trial.
This may seem an easy task, but a battle between Summoners is the most difficult and most effective method of testing the ability of a Summoner to control his or her summoned creature.
Ask about battle methods.