I have a few questions about the setting, Wolfy. Since you mentioned Sekirei and Fate/Stay Night as examples, does that mean this game will also take place in a more modern day setting? Will it be a sort of alternate modern day setting where monstergirls and humans have lived side by side for a long time or will it be more like the two mentioned series, where the tournament and the existence of the monstergirls is a secret affair? Is it the intent that only the monstergirls fight or do their human partners also partake in some fisticuffs?
Edit: also edited my character slightly. Made him two years older, so that it's more believable for him to have become his sister's guardian, instead of her being shipped off to a (distant) relative or an orphanage.