Erato's Cape

Cannot be auctioned, traded, or bazaared, but can be delivered to a character on the same account.
Can be obtained as a random reward from the Gobbie Mystery Box Special Dial and similar sources.

Erato is the Muse of love poetry in Greek mythology. She was classically depicted with a lyre or kithara, both stringed instruments; this would probably explain the skill bonus on the cape.