Flopsy would be both Mystical and Extrahuman, then. Her strength, toughness, healing, and other abilities are enhanced by magic woven into her being during her creation, though even without it she'd still be quite a bit stronger than most humans. (And by ERASE standards, she'd probably be somewhere between 5 and 6. It'd take her some time/effort, but she could probably do some damage to a building's structural supports and bring it down, at least partially. She can lift around 1600-1800 pounds in her natural form, and land from about a 5-story drop without harm.)

Yeah, that sounds reasonable in my assessment for the scale rating.

Also, does she ACTUALLY use mystical? Or was it just used to create her? Might be a bit different.

She was created via magic, and has enchanted gear (collar and horseshoes), but she recently discovered she has the ability to use magic after all. She had thought that, being a Living Construct, she didn't have a soul. As it turns out, one got accidentally and unknowingly pulled in during her activation (and is actually the only reason she awoke in the first place, and is why none of the others did). During her Big Fight (Chapter 11), she uses a spell she subconsciously copied from Phantasy Star IV, and afterwards has to move the enchantment in her collar to a new one (Chapter 13). She's still getting used to the idea of being able to use magic, and she wasn't paying as close attention to runes as she probably should have, so she really only knows a couple fire spells and some notes she copied out of a set of books on enchanting items (and made a "practice item" in Chapter 12 for a friend).

Gotcha. I'd note the collar and horseshoes would be classified as Assets in and of themselves.