If a character is evil its uncharacteristic of an evil character to be too chatty. As for the good character, you could make them less chatty but they should still be more friendlier than an evil character. These are polar opposites. I think currently in the game, if you choose to be evil, I believe Gate and Wyll may leave the party, since they are considered "good" characters. In most rpg video games where your choices matter, they also have consequences from those choices. Being too evil may cause a companion to not like you, leave or stop talking to you. If you are friendly with them, this will cause them to talk to you more because they like you and consider you their friend.
