Since I’ve been having this headcanon for a while now, I’ve been wanting to write something about it as well and after seeing marty’s fanart I finally got the right inspiration to do it.
Warning: major spoilers for Thor 2 and major character death
Thor wasn’t asleep yet when he heard his door silently being pushed open. It wasn’t too late after all and he was already old enough to still be awake at this time. He stayed silent, listening closely to the person entering his chambers. Thor knew who it was, even without opening his eyes. Too familiar were the faint footsteps of his little brother’s bare feet as he carefully tip-toed through the dark room towards the older’s bed.
“Brother, are you awake?” The slight tremble in Loki’s voice almost broke Thor’s heart. He was about to sit up when he felt the younger’s small finger tapping on his nose. “I am.” Thor opened his eyes, examining Loki worriedly. The raven-haired boy looked scared and he was shivering. Thor wasn’t sure whether it was out of fear or because he was cold. “What happened?” He sat up, immediately reaching out to lift his little brother on his bed and pull him in a tight embrace. Loki’s arms wrapped around his back as soon as their chests touched and to Thor’s relief he no longer was shaking as badly as before.
Loki stayed silent though, simply pressing his face against Thor’s neck. The older noticed a wetness on his skin, realizing that the younger was crying. “Loki, did you have a nightmare?” Thor gently stroked Loki’s hair as he tried to calm him down. He could feel his nod against his neck.
“Ssh, it’s all right brother. I’m here now”, Thor whispered, trying his best to comfort the crying boy in his arms.