On one fateful day- 2 stars flew in the sky- stars that were 2 people exclaimed to fate.
Traveler POV:
"So what you're saying is that you fell here from another world? but when you wanted to leave an unknown god blocked your way?" Paimon said as the traveller recalled the moment they were separated from their sibling: (Doing it script based for this part)
Goddess: Outlanders your journey ends here!
Lumine: Who are you?!?!
Goddess: The sustainer of heavenly principles. The arrogation of mankind stops now.
Both siblings drew their swords ready to fight against this foe. Little did they know they'd lose the other one. Dodging the blocks steadily to avoid capture for a moment. The now-traveler struck a block and backed away in time to avoid capture. The other one though. . . "Aether/Lumine!" the traveler cried to their sibling. They tried to strike the god with lightning to no avail. Exploding around them but they didn't get time to react. Forced into a block- they called out, "Wait! Don't go! Give my sister/brother back!" . . . . . In the present day they say, "And just like that, the god took away my sister/brother. Some kind of seal was cast upon me, and I lost my power. So while we used to travel from world to world, we are now trapped here."
The traveler looked down. Saddened they couldn't see their sibling anymore. "How many years ago was it? I don't know. . . but I intend to find out. When I woke I was all alone. Until I met you two months ago." A gentle smile appeared on the traveler's face when saying that to paimon. "Yeah paimon really owes you for that- Otherwise paimon would ha- Watch out!" Something came barreling from the sky- another box of that same god. "Get behind me." The traveler said, in case it was them again. It wasn't- and they both had a questioned look on their face. It was, legit, a knocked out 3-year-old in strange clothes. Paimon poked them. "Paimon no that's a child." The traveler said. "Paimon was making sure it wasn't a bomb in a really good disguise!"
The kid awoke eyes sparkling. They were small, brown hair and red eyes, wearing white clothing w/ strange runes on them. Certainly wasn't normal. "Could they be another world traveler or here by some accident?" The traveler said. They checked to make sure they're ok. The kid had giggles from stuff- so seemed ok. They had a recognizable seal though. "Same seal. They're in the same o deal as I am." "Paimon is confused- how can a 3-year-old be in the same situation? They can't do much can they?" She was curious- and the traveler had the same curiosity. "I don't know but might as well try and figure that out." The traveler picked them up and set them on a piggyback. Going off to where ever they could. "Hey wait up!" Paimon called as she chased the two.

YOU ARE READING
A child- and destiny (Genshin Impact AU)
FanficBasically I have a 3-yr-old Oc named Erin- what if she was similar to the traveler and fell that same day to end up being a close traveler with them? (Ships will be hinted at in this story)