Rules: As long as your OC is not god-mode. Like any teleporter or flash level speedster.
Thermal Vision: Useful for seeing in the dark and also beneath thin stuff, if anything giving off heat is beneath. So yeah she could see through your clothes, your skin is a lot more warm than your clothes. Don't expect her to see through wall though.
Wind Breath: She can blow powerful gusts of wind.
Invisibility: Can become invisible but must remain still while doing so.
Metal Mode: Her other powers won't work in metal mode but she's immune to concussive damage. She's also stronger, able to jump 10 ft high. She's essentially solid metal.
Shrinking Arrows: Have suction cups on the end. They shrink stuff on contact. So if they hit a person, even if they were clothed, it would shrink the clothing with the person. How small? Your height would be in inches. So if your 5 ft, you would be 5 inches. The arrows are pretty light weight, so they won't crush the person after they shrink. Of course the arrows have limits, they won't work on large stuff like buildings.
Pellets: She has 3 types of marble size pellets. Gas, blast, and freeze blast.