Riku in 'Kingdom Hearts 1' is such a fascinating character because he dances the line between antagonist and tragic figure. At first, he starts off as Sora’s best friend, but the jealousy and desperation he feels after being separated from his home push him toward darkness. The way he succumbs to Maleficent’s manipulations makes him more of a pawn than a true villain—he’s lost, not evil. The scene where he taunts Sora in Hollow Bastion hits hard because you can see how much he’s struggling with his own choices. By the end, though, he fights back against the darkness, proving his heart wasn’t ever fully corrupted. It’s one of those stories where the so-called 'villain' is just a kid who made terrible mistakes.
What really got me was how his arc mirrors Sora’s in reverse. While Sora gains friends and light, Riku loses himself bit by bit. That duality makes 'Kingdom Hearts' so compelling. Even now, I think Riku’s journey in KH1 is one of the most human parts of the series—flawed, emotional, and ultimately redemptive.