P'UNK～EN～CIEL is an alter ego of L'Arc～en～Ciel. Introduced in 2004, hyde takes over guitar, ken the drums, yukihiro plays the bass, while tetsu performs the vocals. P’UNK~EN~CIEL's songs have a more punk sound and their music is usually heavier and faster with a different tone due to tetsu's vocals. hyde wears a pirate patch over his left eye in P’UNK~EN~CIEL performances, and yukihiro is known to wear a gas mask, however, this has only been seen once at a live concert during their SMILE tour in 2004.

Each member is called in capital letters TETSU P'UNK, KEN P'UNK, HYDE P'UNK and YUKI P'UNK. Also, as a way to identify the songs from P’UNK~EN~CIEL, YUKI P'UNK has to yell in every song "One, two, three four!". Each member produces one song of their choice, and they alternate their productions.

P’UNK~EN~CIEL is the revision of D'ARK~EN~CIEL, the former being a special event that took place during the early L'Arc~en~Ciel years when sakura was the drummer. The only material released from them being the 18-minute B-side "D'ARK~EN~CIEL" found on the (then) unreleased the Fourth Avenue Cafe single.

Their songs are recorded and used as B-sides on singles from 2004 and their performances can be found as extras on Live DVDs. P’UNK~EN~CIEL also had a television appearance with the television personality Aoki (From Music Fighter) and performed live with her at Budokan singing Round & Round 2005.

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