The Northern Light Thief, a villain with the power to absorb energy sources, leaving areas in complete darkness. This full-body portrait should depict a stealthy and enigmatic figure, embodying the theme of darkness and light absorption. The costume is sleek and dark, with accents that mimic the colors of the Northern Lights - greens, purples, and blues - but in a muted, almost drained way, suggesting the villain's energy-absorbing nature. The Northern Light Thief's posture is agile and elusive, like a shadow moving in the night. The face is partially concealed by a hood or mask, adding to the mysterious aura. The background can be a nighttime scene with a faint aurora borealis, highlighting the character's connection to the Northern Lights and the theme of light theft.