Re: Seven Guardians of Light and Thirteen Seekers of Darkness.
Yeah the heart was definitely less stable when Riku was possessed, but we don't really know if the fight continued to this day. I also feel that Riku seemed more interested in stopping Ansem in that moment than actually completely regaining control, that might have helped too. It is after all a smaller goal.
Terra definitely did try to regain control, but he had to fight an unhindered Xehanort. I'm interested why Xehanorts failed attempt opened a gate into the realm of darkness, I have the feeling that might have been Terra's interfering that caused it to happen.
Yes, the way that Riku and Terra approached the situation did definitely play into when and how they could try to properly fight back. I think he probably was able to see that he'd been going the wrong direction during the fight against Aqua, hence why he managed to show up.
I don't know if it was only because of the darkness, I feel it grew because Riku gave into that distrust and jealousy just like Maleficent encouraged him to.
As you pointed out they were all in some kind of peril, so even though they were there and wanted to help they couldn't.
I personally feel Aqua would have done it at any point. Even if she had her differences with him, she seemed to be concerned about him. Her whole "that's not what the master told you to do" and her reaction after learning from Terra what happened to their master were probably her way of expressing concern that he'd fall into darkness. So she might not have been supportive of his actions, but she still cared about him. But that could just be my interpretation of her character.
That Riku seemed more interested in stopping Ansem at all cost seems to be the case indeed, as he implores Kairi, Donald and Goofy to flee, indicating that he doesn't expect himself to be able to hold Ansem off for long.
This is all part of the whole mystery that surrounds the "Terra/Xehanort/Eraqus"-mess that this whole heart-conglomerate is and which Nomura refused to delve further into yet (even worse, in DDD he even deepened the mystery). We do not even know
why Xehanort's attempt to expel Terra's heart didn't work, Ansem succeeded with Riku just fine and he had no Keyblade at hand, unlike Xehanort.
It has been theorized that this may have already been an instance of Terra and Eraqus working together against MX, but we don't know anything for sure.
I'm more inclined to believe that during that fight, Terra inside Xehanort was finally able to overcome his feelings of despair and rage to a certain extent, and seeing Aqua believing in him and
trying to best Xehanort brought him into action, in the hope of not losing Aqua after he already (supposedly) lost Ven (last thing Terra saw was the energy pillar of Vanitas initating X-blade sorcery). The Lingering Will came already into being due to Terra's immense rage and determination, something we'll notice Riku wasn't doing, not because he might be incapable of it, no, at least at first Riku
welcomed Ansem as an opporunity for power, while Terra rejected Xehanort from the very beginning.
I could imagine that there was at least partly an interdependency at work, with the negative emotions increasing the darkness more while the darkness caused even those emotions to intensify until Riku was incapable of any rational judgement.
Did I ever imply Aqua didn't want to help him? As you said above, unlike Sora, she was
incapable of doing so during the Keyblade Graveyard events because of Braig and Vanitas. Xehanort freezing Ventus into a popsicle had certainly more meaning than just to make Terra mad and hurt him "for the lulz". Xehanort knew that both Aqua and Terra were very protective towards Ven and by putting him in peril (and send Vanitas after for the X-blade) he effectively put Aqua into a tough choice-situation. Go help Terra against Xehanort? Nope, bad idea, then Vanitas would get to a helpless, frozen Ven.
The fact that Aqua actually choose to help Ven first (she also didn't expect Braig appearing to stall her) proved that she had still faith in Terra, which she also rubs right into Braig's face when he shows up.
Being a master of manipulation though, Xehanort expected that and proceeded to drive Terra to a point where he would lose control of his darkness.
Heh, finally, sephly and Adrian are talking like it should been.
You guys are so interesting to watch/read about anything of Kingdom Hearts.
Now, I see major differences between Riku and Terra, but the same thing is they're fighting the Darkness no matter what. Riku grew more mature and wiser during his adventures trying to get rid of Darkness yet used it for the right reasons, i.e. fighting Roxas to reawaken Sora.
If you ask me, I think Riku is the real main character after all, but that's just me.
Looks like we got a spectator, *ggg*.
Of course, despite all similarities, they
need some differences in order to better show off the different possible paths and actions they take.
Sora and Ventus are in fact also different in some aspects.
I would be cautious with saying Riku cheating with Darkness to kidnap Roxas and set him up to disappear against his will were the "right reasons" though. In the very end, his
goal might have been noble (to awaken Sora), but not his actions. In regards to Roxas he, Naminé and DiZ weren't any better than the Organisation in that they were just using and treating Roxas as a tool to further their own goals instead of treating him as an individual with his own wishes and will.
Riku is definitely the deuteragonist, meaning the second most important character of the series after Sora. All the trios and Mickey, Goofy and co. might be main characters, but Sora and Riku still stand one level above them.