AusGamers has an interview and preview feature with Platinum Games' Hideki Kamiya for Scalebound where they ask about character customisation and just how much you can use the dragon commands.
From the interview:
"There’s a balance to strike with this, which should involve equal measures of challenge versus greed, and nurture versus power.
“So there really is no limit; there’s no restriction on how many times [you use Thuban] or you give the order to attack, but if you think about it naturally he is a living creature himself so if he’s too aggressive then it means at some point he’s going to wear down or if he gets too close for being too aggressive, he can gain more damage against himself,” Kamiya explains of Thuban’s commands and usage. “So it’s really about finding that right balance of ‘okay, I want to use Thuban this much, but have him come back a bit’ so you can have that right balance and so you can go for the final attack.
“In terms of customisation, the main character is really the dragon,” Kamiya continues.