Original appearance + Witch + a bit of Doctor. This one is quite flexible and modular, add what you want as you see fit in both positives and negatives.
Main trigger\Face - mercy, high ponytail, hair tie
Original outfit - mechanical halo, bodysuit, long sleeves, gloves, loincloth, brown legwear, armored boots
Witch outfit - witch, witch costume, witch hat, book on belt
Wings - mechanical wings, for spread out yellow ones use yellow wings, glowing wings instead, use no wings to remove them if they appear on their own.
Miscellaneous - labcoat, name tag, periscope, glowing, holding staff, hair over one eye, short hair
Checked strength range is 0.5-0.9, more weight - more Overwatch style bleeds in.