A couple more tweets were posted by the Xenoblade Chronicles X official Twitter account yesterday. The posts revolved around the “Soul Voice” mechanic that is to be implemented in the upcoming title. Below are the tweets (roughly translated in the browser).
Soul Voice is a way to interact with characters within the game, where the characters may give advice on what to do in battle. If executed properly, “Soul Stage” will be built up, and once built up enough, will offer bonuses to the player in the middle of the battle. You can see a combined translation of the tweets on Nintendo Everything.