the Guardian would've killed you for treason. The Guardians are each over 1,000 years old if not 2,000. The fight we're about to go into with Septim's going to last a while, not like the skirmish we just had in the forest. If you read the RP from the beginning, 12 Guardians took the whole country. I doubt after your character stopped Septim, actually any Guardian in general, you would've been killed on the spot for treason. The reason we have a party is because none of us are able to fight them alone.
As for that outfit, it's a tenugui. But that's a pic for a costume, telling by how loose it is. Ninjas don't wear loose clothing. if they wore anything close to loose, the ankles would've been tied tighter and the arms just as tight before it reached the elbow.
And as for my intro in mind for you, I have a couple, but I'm still debating. The characters have a couple more days before the fight, so keep your pants on.