Feel uneasy if this was Aqua’s final moments like “see the tunnel” experience.

Its set up in a way where Aqua/Gorou can die and his spirit fades away or he is being brought back to life and he is comes back as Aquamarine Hoshino as Sarina’s key chain is left behind which I feel is like saying Gorou’s part of him has finally found a reason to move on and allow him to be Aqua and act his age.