Going for pjo!Hyacinthus angst here. Not even attempting to weld this to canon. Please remember this is in the context of the Percy Jackson books.
Sooooo, I've heard/read myths where Hyacinthus wound up Ascending after his death and had his own little cult. Which in the context of pjo can lead to two fun possibilities:
1. Apollo got his boyfriend back briefly only for him to fade all over again as he lost worshippers. The pain, the tears.
2. Hyacinthus was waiting for Apollo up on Mt. Olympus but Apollo's memory being trash from being stuffed into a human body, he can't remember. All the visions of Hyacinthus talking to him was Hyacinthus attempting to reach out to him from Mt. Olympus.











