Only two can do this. (one shot)

Wondering Twin

Aether, he has traveled through all 7 nations of teyvat, he has gotten every element.. Hydro, Pyro, Dandro, Cyro, Electro, Anemo and Geo. He has met many friends over the past years and now he is finally in the city ruins of Khaenri'ah.

He walks carefully among the the path that once was so clear. He had left Paimon behind in one of the restaurants while he went here. Aether didn't want Paimon to get hurt. He hears noice over in a house that is mostly standing up.

He finds lumine, the abyss Herald and Dain there about to put the eye of the first ruin quard in the statue.. But they get interrupted because of Aether.
"Aether?! What are you doing here?" Lumine asks confused.
"Be carefull Princess, he is strong"
Says the abyss Herald.

None of them pay much attention to Dain so he takes this chance.
While they aren't looking, Dain pulls out his sword and stabs Lumine straight through her stomache.
"LUMINE!" Aether screams, it echos through the abandoned city. Aether helplessly, watches as his own blood falls to the ground, motionless. The abyss  Herald is livid and attacks Dain, while Aether runs to Lumine

"Lumine! Look at me! Can you hear me? Say something... Please!"
Aether screams while holding her close. Aether trys to heal her with Dendro element mixed with Hydro elemental but It doesn't work, not without his divine powers. Aether feels a warm but cold hand on his cheek. He looks down tears clouding his vision.

Lumine looks up at Aether and with her weak hands, takes the flower in her hair and hands them to him.  
"I gess this was our final adventure, dear brother"
Lumine says while the light leaves her eyes slowly.

Aether livid, attacks Dain who killed his Sister. He defeats Dain and gets a little picture frame from him. Then he attacks the abyss herald for because they couldn't save his sister. In the end Aether is surrounded by the bodys of the abyss Herald.. Dain
... And Last but not least his Sister whom he couldn't say goodbye to.

He looked down and saw the flowers of his Sister. He walked slowly to her. He brushed his hand through her hair. It's softer that he remembered. He remembered the first time they stepped into this world...
"This is my fault... If I hadn't said that we should leave knowing this world was in the war of gods... She would be alive and we would be on our next adventure..."
Aether said while fighting tears that  he couldn't defeat.

"If you make a promise, you keep it. If you make a mistake, you apologize... If you give someone a dream, you defend it to the end..T̵̮̃ḫ̷̕a̶̮̕t̴̪̋ ̵̹̄ḯ̷̞s̴͈̆ ̸̙̂w̷͙̔h̵͔͗ȁ̸̯t̸͙̚ ̸̪̊f̷͇̎a̶̞͊m̵̧̈i̷̥̾l̵̞͋ý̸̤ ̵͚̊i̸̻̋s̶̲͊ ̶̙͠a̵̲͝l̶̜̔l̸͖̈́ ̵͚̓ä̸̪́b̷̞̃o̵̘̽ǘ̵̯t̸̺͋,̴̱̐ ̵̤̅i̶̦͂ș̷̽ń̸͓'̶͈̍t̸̗̄ ̴̙͐i̷̩̿t̸̜̀?̵̭̔."
Aether could hear Childe's voise.

"You are a better big brother than I... Childe."
Aether chuckles and more tears fall.  Like comic books, his and Lumine's adventures flash before his eyes. Remembering life before adventures. He looks at the picture that Dain dropped and it is a picture that Lumine's and Aether's parents took of them before they left on an adventure.

Aether looks at the sky stars blink without the worry. Aether smiles, he sees his sisters constellation in the sky all light up. That means she is safe and sound. He doesn't need to worry, all tho the death of ones sister shall hurt more than knifes.. Aether knows that his sister is not hurting and watching over him.

Aether For knowing without his divide powers he is mortal. He has exepted this fact. He sees a old cemetery. He looks at Dain and the abyss Herald. He buries them in there so they can live in the memories of their old home. Aether then picks up Lumine and starts walking.

He finds a good spot, under a big cherry blossom tree. Aether remembered his Sister loving cherry blossoms. Aether buries lumine under the tree and uses Dendro to make it so it is going to have cherry blossoms round the year. Smiling Aether sets his sisters blade on the grave and casts a spell that makes it impossible to enyone to take.

Aether says his final goodbye to his Sister and starts a new adventure. Aether hasn't gotten his divide powers back so he is a mortal. So he desided to travel to every country of teyvat for the final time, meet all of his friends he got on the way.

He got to Liyue with Paimon and he is met by the 11th fatui harbinger, aka Childe. Childe trys to make small talk but one has finally seen the set of flowers in young boys hair. Aether smiles at Childe.
"You are a better brother than I am."
Aether smiles at Childe and then Childe realised whom those flowers are. He takes a sharp inhale.

Aether and Childe have tea. Soon Aether leaves Liyue behind, walking towards Mondstadt. Once Aether steps into Mondstadt he is met by worried Venti. Paimon gives hand marks and that makes the windy bard leave. Aether sighs.
"Do you want to be alone?"
Paimon asks and Aether nods.

Aether gives Mora to Paimon so If she wants she could go to good hunters. Aether continues his way through windrise, through whispering woods, and he stops at Starfell lake. Aether stops and stares at the anemo statue.
" This is the first one"
Aether says and lightly brushes his hand against the statue.

Aether climbs to Starsnatch Cliff. He sits down and watched the sun rise. He looks at the sky and waves at his sisters constellation. The constellation blinks little bit back to him, making Aether have a warm smile while a tear dropps down his cheak. He gets up and slowly walks down the mountains remembering the adventures he had... Who he had met..
before ending back to the beach he first woke up.