You could get an ODST chest plate and shoulders in addition to the helmet. Was probably my fav armor set in a dark grey/black color scheme almost exclusivity when I played. Still it does look like the standard suit rather then the Armor variant.
Madoka: I'm not coming with you. Homura: No! That's not - we go together. Madoka: It's already done. Homura: I'm not leaving you here! Madoka: Homura-chan... *gives Homura her ribbons* Homura: I promised to take care of you! Madoka: We were supposed to take care of each other... and we did. Homura: Madoka, please! Wait! Madoka: Welcome home, Homura-chan.
Madoka: I'm not coming with you. Homura: No! That's not - we go together. Madoka: It's already done. Homura: I'm not leaving you here! Madoka: Homura-chan... *gives Homura her ribbons* Homura: I promised to take care of you! Madoka: We were supposed to take care of each other... and we did. Homura: Madoka, please! Wait! Madoka: Welcome home, Homura-chan.