Headcanon: Powers
From her exposure from the meido stone (in TFA) as well as cheating death the two times she did successfully, Rin has recently obtained peculiar powers. These abilities have so far, shown to be connected with assisting unrest spirits to safely depart to the afterlife.
Rin can also sense demonic auras, and see servants of the underworld/destroy them with a touch. She is able to melt away barriers, as well as create a single mobile barrier that surrounds her and anyone she touches until it's destroyed. While not of miko purity, the strength of the barrier is quite useful in a pinch.
Finally, she has the ability to heal any ailment of the dying/fatally sick. The reason for this could be a link between being saved by Sesshoumaru's former blade, the tenseiga.
Still on a journey to untap these newfound abilities, her encounters with certain people/demons will help her understand the extent of the powers that have chosen her as she silently questions "why me? and what am I meant to do?"
As of now, she is on a journey with Kikyo, overcoming the obstacles that stand in their way as they train to learn more of what Rin is capable of.