In regards to their stats, perhaps I should explain my reasoning:
Their HP is relative to their level, but their other attributes (attack, defense, etc.) are out of 100 and are relative to their overall design/personality. Think of it as one of those pentagon-shaped distribution graphs, except in purely numerical form.
Although it's not exactly how it would be in a real game, I think it gives a better sense of each character's strengths and weaknesses at a glance.