Abducted from his birth family by Jared Lavigne as an infant
Magically abducted from the Lavignes a second time as part of the Zodiac summoning around three years of age, but was retrieved fairly quickly; grew up with the narrative that he was heroically rescued from (incompetent) villains
Other than the (second) kidnapping, his childhood was as unremarkable as it could be in the Lavigne family until the sudden of disappearance of his older brother, Lycus (now Lorne Key), when he was ten
Everything was a little off-kilter after that, a huge shift in his childish worldview, and he became convinced that it was his responsibility to try to keep the family together, at least until Lycus came back
Lycus never came back
River poured his energy into being the family moodmaker, mediator, doing his best to appease everyone and keep them happy so they wouldn't leave too
It didn't work for long; Ruby started drifting away, their mom was always busy, but at least he always had dad and Revi
Then, the summer when he was sixteen, in Taipei with mom, he started digging around in an old family archive out of boredom and discovered the pieces of something that felt too heavy to hold when he started putting them together
Lycus. Not adopted, stolen. Abducted. The way River had been when he was two. Except dad didn't rescue him — he was the one that did it
Distressed and in tears, he went to Leah for reassurance that the conclusion he'd come to couldn't possibly be right. She confirmed that it was, and his world crumbled a second time
Not only was it right, but mom knew — and if she knew, did she help? No, she said, she hadn't know until Lycus left. But then… What about River? The other adopted son?
Leah didn't know; she suspected, but she didn't know. But they could find out. She promised to help him find out
It took a year. Ruby left for college. River didn't know how to look at dad anymore, and Revi was so happy — she didn't need that burden
The night River found out for sure, it was just him and dad at home. A terse phone call from mom in Taipei; she'd been able to find his birth family, but there wasn't much information: a news article about their missing infant and a double obituary from not too long ago, some kind of accident; River's head filled with static
When he confronted Jared, he didn't even seem surprised, calm in the face of River's tears and shouting. They were irresponsible, he said of the parents River would never know, they would never have taken care of you properly and haven't I done that? Hasn't your life been easy?
River never spoke to him willingly again
He tried to keep up appearances for Revi, but he was adrift, no one to talk to about the crater of his life as he knew it; Leah was away in Taiwan and Ruby never picked up the phone for more than a minute or two if at all and he wasn't sure if he could bring himself to tell her anyway
In the midst of standardized testing and college applications, a way forward slowly coalesced; in college he would no longer be a Lavigne; he would be a Hsu
It was imperfect, he couldn't hold his mother entirely blameless, but at least she'd helped him. At least she told him the truth when she asked. At least he would no longer carry the name of the man who had ripped him away from the life he could have — should have — had
Always a good student, he went to school in NYC, where he had cousin to spend time with. He dithered around a bit before settling into geoscience, a discipline that came to him naturally, magically, and let him settle his mind as he came to terms of what his life would be like now
There he met his long-lost cousin, Aren Lavigne, also a Zodiac, which gave River, now going by his Chinese name Jianhong, a new avenue for his need for pack ties — a new family, not to replace the one that had been shattered, but perhaps to supplement it
Moved to Boulder, CO for his MSc, which he mostly pursued for the job opportunities it opened up to him; there he had the time and space to really settle himself into his new reality, without the complication of family proximity
Still went home for school breaks and holidays, but mainly for Revi
Sometime during this period, Leah fell out of contact with her children
Worked as an entry level field geologist throughout his masters and stuck with it afterward, until Revi told him she was in Avior, with not only Ruby but Lorne, formerly Lycus. Since cousins Aren and Remy were also there, and there were geoscience positions open at the Observatory, there was no reason for him not to pack up and join them