>>96510176
>Ran Nejima
Most overtly, Twinned Wrath "speaks" to Ran with the voice of his brother. It's usually hints and trying to push him to do better ethically, like the trope with an angel on someone's shoulder. Sometimes it's not really speaking to him, but more of just shaping Ran's thoughts to "sound" like that of his brother, and Ran can't tell a difference, so he assumes it's his idolon speaking to him still. Something else he doesn't realise is that it also directly affects his personality without the verbal factor. His willingness to change his path and grow better is a direct result of that (mechanically a side-effect of Raging River + Cogito, Ergo Sum).
It can also pull in the opposite direction too, enhancing his own more violent and impulsive nature, especially in the Idea World and when his allies get hurt. Then, he grows even more impetuous, abandoning self-preservation, and willing to go further in the terms of hunting down the enemies.
The intensity of both effects fluctuates, somewhat, independently. When both grow high, it can negatively affect his coordination, with the left (white and blue, more affected by his brother) and right (gray and red, more affected by his own nature) sides pulling in different direction, but to reach that level, the situation would need to be really extreme. Usually, both "pilots" work well together.