Another Underworld siblings angst post because they are my favorites 🥺
We all know what happened to Bianca during TTC,when Zoë decided to pick her for the quest,Percy "promise" to Nico,and then what happened next. That's one of the most plot point talked about to this day. But the similarities that it has with Hazel going on her quest?
Nico lost his biological sister during a quest that was going to free Artemis (and Annabeth),a goodess that was trapped down by the weight of the sky by a titan. And Percy was part of that quest. Sure,he wasn't in the original set up,but he went with them anyway because he wanted to free Annabeth. Bianca died. And when Percy told him what happened (Chiron where was your "responsible teacher who has taught thousands of heroes and who has seen these heroes fall in battle" person at??) Nico flipped over. Then we got the big reveal of his heritage and he disappeared until the next book,when we see him being manipulated by Minos.
In SoN,Mars write down a Prophecy for Frank,and he has to pick up which people he want to go with. Since Percy was already on board because Mars said so,Frank chose Hazel as his third companion. Their mission? Freeing Thanatos,that was chained down by a giant. By doing so Hazel didn't know if she was going back in the Underworld,since Thanatos's job is to retrieve souls. Half of the time she didn't even know if she was going to survive this once they freed the god. Also,Nico decided to jump,disappearing for a while and we don't see him untill the next book,where he is trapped by the gaints.
Nico watched Bianca being picked up by Zoë to go on a quest,trying to free Artemis and dying,feeling her dead,and having Percy telling him what happened.
Nico had to watch Hazel being picked up by Frank,going on a quest with Percy,trying to free Thanatos and being unsure if she was going to live after it.
The worst thing? He got to know that Bianca was dead,while he didn't know if Hazel could make it because he was in Tartarus. Until he saw her again,at the end of MoA,Nico didn't know if he still had a sister at all. And both of the time,it was Percy they went on a quest with.
And the best part? In SoN,when Hazel and Nico were talking about him,Nico told her that Percy was dangerous for his enemies,but if you are one of his allies? You don't need to worry about that,because he will stand by you. Nico trusted Percy with Hazel the same way he did with Bianca. He trusted Percy to keep Hazel safe,even with that happened with his other sister,and the danger of death coming.
This scene always made me realize how their love-hate relationship is done perfectly.
There are moments where they will try to strangle each other for things that are out of their control and not their faults (Bianca's death was her own choice,and Percy couldn't really promise Nico what he asked for; Nico "betraying" Percy wasn't his fault but Hades's,and he couldn't tell Percy the truth because of the stakes in HoO),and others where they will trust their own life,and the people they care for,in the other without a second question asked (Nico with Bianca and Hazel,Percy with the rest of the Seven and their mission).
They don't have the best "brotherly relationship" because of what happened between them,and some times they are bitter with each other because of it,but at the end of the day they are there when the other needs them most.
Nico also know that when it cames to friends and family,Percy isn't one to mess with. He didn't remembered him at the moment,but he was Hazel's friend. And we all know that Percy is fiercely protective of his friends. Nico know that she was in good hands,and this time he didn't need a promise for that.
And the relief he probably felt when he saw his sister again,finally knowing that she was alive,Thanatos didn't took her away from him,and she was there for him. And Hazel,that for at least half a book had to hear gods and monsters either telling her that her brother was going to die,or that he was getting weaker and they needed to be hurry up otherwise he was gone,finally seeing Nico again. She also didn't know if by the end of MoA she still would have a brother or not. Both of them were clueless of each other survival and took the gamble. And in the end they both survived.
Well know what happened next with the rest of the books. During HoH those two were so close,and it really put emphasis on their sibling bond. They just found out they were both alive and didn't lost the other,while trying to do some crazy shit that put them in danger,so they spent a lot of time together to make sure they were there. No one was going to take them away anymore. They were together in this.
All those posts about: "Nico watching Hazel going on a quest with Percy after what happened to Bianca",and how he must have hated Percy for it,make no sense because Nico didn't hate Percy the second time around,he trusted him; and during the first time he was also dealing with his feelings (pretty sure he didn't realized yet his love for him,but the religious trauma was there all the time),and the fact that the "hero" he envisioned couldn't save his sister. He didn't like the situation,because it was happening twice and in the same way.
Also,headcanon that Hazel doesn't know what happened during his trip with the statue,so she will forever be clueless about the fact that she was going to lose her brother again,this time almost permanently. Nico never told her because he didn't want her to know the full risk he was taking and how close to death he came.
This is probably canon or close enough since those teenagers won't speak about their trauma,and apparently Dionysus is the only therapist they have. And he probably have his hands full with just Nico,because that boy is straight up trauma glued together with some feelings.