tissue princess

Popular Nicovideo musician, known for bass skill, use of tissue boxes as song tally, and cosplay as Nagato Yuki. Generally accepted to be a trap.

Most artists depict Tissue Princess/Tissue-hime as Nagato Yuki herself playing the bass, so Tissue-hime tags are invoked when Yuki is sitting on a bed, playing bass, with tissues at her side, just like the real-world Tissue-hime.