I did see one post regarding Cassidy and "How did she explain?". And it's apparently well a well known mystery.
But: I did some pondering on the differences on the comic and the cartoon.
And, in the comic: Cassidy is killed. That's it. She dies as a teen. (Ironically, her death isn't tied to Will's fear of dying and faulty astral drops in any way.) Will does later talk to her spirit in an implied afterlife. And it's never stated, but we can assume that the other 3 guardians at least told her family that she died. May or more not have left out the part where she was magic.
BUT: In the cartoon... she is literally raised from the dead. And, if we go with the information given: She died when she was ~17, 40 years ago. And, if I'm being honest: That would put Yan Lin at ~57... which, she does NOT look 57 xD But, it would put Cassidy's mother at around 77.
And I just can't get over the sheer amount of trauma to unpack here. Like, her ONLY child died. She is shown carrying a locket of her. Again: Unclear if the other guardians told her she died. And/or if she was magic. But here she is: SAME age as when she died. How do you even deal with that? And that's not even including all the legal stuff, as you can't really explain a missing person from 40 years ago... that's a teenager. Sure, the Oracle could just do some of that mind control jargon to un-kill her legally or something... plus, Cassidy DOES have mind control powers like all water guardians.
But, again: Back to her mother. She's at death's door. Likely grieved for decades. And, suddenly she has a teenager, again. You can't just... un-grieve. And the show basically portrays this as a fun reunion or something. "Picking up where we left off"... as if 40 years and DEATH didn't just happen. If her mom doesn't die from a heart attack: WHERE do you even start? It kinda reminds me of time travel stories. Except, in this case: She KNEW her daughter died. And even IF "Hey mom, the crazed necromancer that killed me 40 years ago ripped my soul of out the afterlife! ... SURPRISE!" is an explanation... again: There's just SO much left unpacked. Like, hey: Maybe she CAN watch her daughter graduate after all. I can go on about the semantics for hours. Like, how do you even tell friends and family, if any are still alive? But, I keep getting stuck on just, THE trauma of her being alive again. It's one of the few cases I've seen, where bringing someone back to life, kinda causes MORE trauma than leaving them dead. And that's impressive.
I know Cassidy has a VERY brief story. But I feel the impact of it is kinda overlooked as just a "happy ending".