Ambiguous tag.
For the artist formerly tagged here, see Shima-shuu.
For some potential artists named tetora/tetra:
tetora_* | *_tetora search
tetra_* | *_tetra search
For some characters named tetora/tetra:
tetora_* | *_tetora search
tetra_* | *_tetra search
For some copyrights named tetora:
tetora_* | *_tetora search
tetra_* | *_tetra search