Pretty much every new sparrow gets a unique trail, and I feel that a sparrow as unique as that should have a matching taken trail. They could just slap the Ossein Skycarver trail onto it and I -blam!- people would be happy about that.
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I felt the exact same way. When I saw the Ossein trail, I immediately thought that's how the taken sparrow trail should've looked. And if the thousand wings ship doesn't have that same trail, it also should since it is taken.