>>3175298Satsuki failed, though. She trampled all over everyone at Honnouji to get a shot at Ragyo and then bungled it. Her vaunted willpower and personal strength amounted to less than nothing, since it drove her to push away or destroy everyone who could have helped her at that pivotal moment. Her success came only when she started to rely on others to cover her weaknesses, because trying to be strong all the time left her brittle.
Ryuuko's arc had a little of the friendship angle, but its main feature was figuring out what she wanted. She was angry that her father was killed, but she didn't know how to react to it. Satsuki criticized her over a lack of ambition, but Ryuuko wanted all the information before she fully committed to revenge. In the end, she realized what she wanted was actually closure. She won't ever get a chance to actually connect with her father, so she fulfills his last wish by ending the Life Fiber threat.
Her failures can all be chalked up to losing her temper and acting without thinking, or assuming her enemies (Sanageyama, in particular) were complete morons. "Don't Lose Your Way" is the core theme for a reason.
Her arc wasn't a straightforward one and she backslid a few times, but it was consistent over all. I may be biased, though. The revenge vs. closure thing hit pretty close to home for me, so someone with different experiences may find it unsatisfying.