matsuoka_miu wearing a halo...yeah, because she's innocent and never starts any trouble... yeaaaaaahhhhhhhhh... did the artist ever READ/WATCH ichigo_mashimaro
Unless sarcasm was intended... then never mind my attempt at sarcasm...
Maybe the halo is a reference to the episode where she dies, but annoys everyone so much that she gets kicked out of hell and heaven. In the end she just gets sent back home.