The hands are, in clock-wise fashion:

• Oblivionis / Takao Kanon (recognized by the wrist cuff)
• Timoris / Okada Mei (recognized by the glove)
• Mortis / Watase Yuzuki (recognized by the sleeve, this artist draws it quite dark, see post #10410680)
• Amoris / Yonezawa AKane (recognized by the sleeve and it not being dark like Mortis')