Sweat rolled down Iris' face as she continued to heal Leon even though she had just started to recover some energy.
Iris appreciated Mako's assistance and didn't want to add to his already considerable load of responsibilities. Therefore, to resolve one of his burdens, she decided to be useful to him and heal his friend.
The healing session continued for around 20 minutes with barely any conversation occurring as Iris requested them to remain quiet as she needed to concentrate.
The healing ability was quite a unique ability in which the main concept was to convert one's own energy into life force and then direct that life force into a foreign body in order to heal any damage that may have occurred there previously.