[Death by Mirrors]

Don't worry, Poti - I'm on the case. Last hint narrowed it down.

Let's see...

• Hat is Winsome Minstrel (or well not really, but close enough. More like a later released recolor thereof)
• Dice comes from the Token Shop (Dice Hair Clips)
• Mask is a current event item (Matinee Kitten Mask)
• Coat has already been an item (Silver Prince Coat)
• Boots come from Eclectic Trends (Belts Boots)
• Pants are a yearly (The Illusionist)
• Cravat I don't know, but Espy said the one he wears is not available in stores
• Belt was an old item (Dashing Corsair)
• Can't identify skulls or leg pouch right now, might be old DIs
• Sword is a monthly (Bushido the Kid)
• Barely visible key (Bohemian Key Necklace)
• Gloves might be rather simple, not much to be seen (Small Gloves)
• Shirt consists of two items, I think (Fancy Blouse and whatever is worn above it as vest)

Okay, do you see anything on Espy not yet mentioned here? Might be wearing some tiny, unobtrusive thing around the neck area, hard to tell. Owning one and secretly wanting another also mostly makes sense when it has more than one pose, so I'm tempted to just guess everything from Archaic Antiquities one by one

Nah, actually I think I figured it out.

It's the sword, isn't it? Or rather the guess pic shows a clasp from the jacket, tiny teeny bit of the collar, the back - which is why we should search without a base - and a piece of the ribbon said jacket was tied with. Either way, same item: Bushido the Kid.

Case closed?