(this takes place in the same age au,if you dont know what this au is,read the oneshot best friends,it will explain it)
viggo:'now 18 years old,he was with the other riders as they were on there dragons'
they were battling the hunters.
and there leader was name ryker grimborn.
ryker: get those dragon riders down!
hunter 3: yes sir!
ryker: especially that night fury and skrill!
(viggo got his dragon during the series riders of berk)
viggo:'glares at ryker,he pets shocklight head to calm down his dragon'
shocklight:'growls at ryker angerly'
hiccup: sink down those ships everyone!
snotlout: ok!
viggo:'looking at ryker,very angry'
(viggo and ryker dont know there brothers yet)
ryker:'looks at viggo'
viggo:'gets shot down'
he lands on the ground harshly.
ryker:'picks up viggo by his arm'
viggo: let me go you dirty dragon hunter!
ryker:'grabs viggo face harshly'
viggo:'tries to get out of hid grip'
ryker: it really is you.
viggo: what do you mean?
ryker:'starts to laugh evily'
viggo:'get scared'
ryker: you really forgot,didnt you?
viggo: w-what do you mean? what are you talking about?
ryker: you know who i am?
viggo: yes,your ryker grimborn.
ryker: and who are you?
viggo: im viggo-
ryker: your viggo grimborn.
viggo:'eyes widen'w-what?
ryker: thats right......little brother.
viggo: n-no! i refuse to believe it!
he gets on shocklight and flies away with the others.
ryker:'yells'this is who you are viggo! your a grimborn! you were born to be a hunter!
viggo:'looks at the others'
they stare at viggo in shock.
hiccup: viggo.........
viggo: i want to go the edge,now.
he flies a bit faster.
hiccup:'looks at the others,worried for his friend'
astrid: viggo brother is ryker grimborn.....
fishlegs: that doesnt mean he is a hunter also.
hiccup:'doesnt listen,he just stares where viggo was'
he couldnt believe that viggo and ryker were brothers.
viggo:'in his hut,he curled up on his bed,ryker words replay in his head'
his real family were hunters.
while he was a dragon hunter.
viggo: im not a hunter.....im not a hunter...
shocklight:'nudges him'
viggo:'hugs him'i will never be a hunter.
he stands up and looks at a picture of him and his adoptive mother.
viggo: im sorry my real family are hunters......
he curls up on his bed,he never felt so alone in his life.
he was born into a family of hunters.
and right now,he was battling his older brother'
(by the way,ryker is also aged down,he is in his twenties,and there parents are still alive
i hope that makes sense)