Sebastian loved Rift, really, he did.
But sometimes he needed time to himself.
But he knew his brother didn't like him leaving Eridanus. So he decided to try and find his own little place in the forest they called home. Of course, he would come back to his brother's glade every now and then, share his den. But having somewhere that was only his, that sounded amazing.
And, if he were to know anything about his own species, it would make sense. Male pumas were solitary - they never traveled with others. The fact that he had been able to stomach living with Rift beyond cubhood was a testament to their bond. But the urge to stake out, make his own territory, still scratched at his spine.
So he found himself walking, leaving the paths that he knew so well. To make sure he didn't lose his way, he rubbed against various tree trunks.