I hope it will be a new character.
A new attorney who worked for Gavin till GS4-1 ;
who knew Athena as his father worked in the same place as Athena's mom ;
who is a good friend of Apollo since the elementary school ;
who idolizes and respects Mia Fey and Phoenix Wright ;
whose first case happens when Apollo (suspect of the murder) was still studying in the university ;
who became lawyer and specialist in analytical psychology at age 18 (like Athena) ;
who worked as independant lawyer after GS4-1 until GS6-1 the moment in which he joins Wright Anything Agency ;
who had hypersensitivity to noise and difficulties to express his feelings and to recognise the others' feelings when was a child (reason why his father gave him for birthday Widget) ;
who left LA - together with his father - to study law and psychology in Europe, specially in Switzerland (in which he met Klavier and became his boyfriend) ;
who reveals to be bisexual and accepted by his father ;
who is also very close to Apollo and Clay as friend ;
who has photographic memory ;
who has the gift to solve puzzles, mostly to classical ciphers ;
who rarely skipped school because of his disability when he was a child ;
whose favorite color is green (to combine his color with Clay's and Apollo's (RGB logic)).

Finally a new female prosecutor? Ooh will they go with an assistant is the final villain twist? What will they do to top their crazy animations last game? Dat speculative excitement.