>>50485012Lillie only has 'plot relevance' in that Tomiyasu used this series to close up her character arc. I agree about Iris being plot relevant here, if only because she actively contributes to the main storyline rather than derailing the anime to complete her own arc.
Also, the whole 'shit character arc' thing is a bit of a cope. Shit by whose standards, yours? Because from a critical standpoint, the writing of this series isn't good enough to claim that any of them aren't shit.