Well, she isn't completely useless, she's a foil for Haruto at least, she's the one who tends to say some matured things. I am not so satisfied with the ending honestly. I was expecting something darker to happen I suppose, given how Wizard sorta feel like earlier Heisei shows. Hopefully they will get back to this again, and maybe they could turn Chizuru into a Phantom, or something. I do like how they addresses the issue that Haruto have to one day finish this though. It's not illogically light hearted.
Water Dragon debut went by quite fast and I was hoping Phoenix and Medusa would intervene in fight since she already did this episode, why don't they keep doing it anyways? If Pheonix and Medusa cooperated with one more Phantom to kill Wizard, it'll be a total overkill. Hopefully they have explanations.