Pre-rehab she was eating enough that her weight loss was rather slow (5-10 lbs/year?) so likely only a couple hundred calories below what she needed. Then there's her long streams where she didn't consume anything. Assuming she wasn't binge-purging, I'd peg her as someone who restricts very high and probably eats everything in one or two sittings after streaming (to avoid showing food bloat during) and fasts the rest of the time. A lot of ana-chans eat at the end of the day so they can (1) sleep easier at night after eating, (2) feel empty when they do their morning ritual weigh-ins, and (3) use daily activities to distract themselves from hunger.
She may abuse uppers or something pre-stream so she can maintain her high energy for the duration of those. She's claimed before she doesn't drink tea or coffee, but I'd need to track down a source for that (if it wasn't deleted with the ECnews channel). Anyways the point is she probably doesn't drink caffeine, unless she's a diet soda fanatic (but I really doubt that). She may take caffeine pills or use them in EC stacks, but that affects your heart a lot and I don't think Eugenia would have lasted this long if she was. I wouldn't be surprised if she uses diuretics given her phobia of sipping water & water weight, and there's that Midol box that's popped up a few times now on stream.
I doubt she eats with her family, given what they must eat, her general avoidance of them & the rest of the house, the schedule she is probably eating on (late at night), the way she acts like food doesn't exist when she's in public, and the general ana-chan shame at eating. I'm willing to bet she eats in her room in private. Whatever she's eating is either pre-packaged or low/no-assembly, since she seems completely unfamiliar with using a kitchen.
Post-rehab, she seems to have lost a lot faster to get back to where she was ASAP, so she was definitely eating significantly less than pre-rehab. She also seemed in a lot worse condition. Could be her body taking a significant hit from the fast weight gain followed by fast weight loss, could be her beginning to binge-purge if she wasn't before, could be just the much lower restriction & her age taking a toll, could be her abusing pills harder. Who knows.
Now that she's near her old body's weight from pre-rehab, I wouldn't be surprised if she's trying transition back to her original habits. Though how well that's going for her is anybody's guess.
She just lies in bed all day and probably weighs 70-80ish lbs. You say she's 5'9? I'd expect her TDEE to be 1.3k-ish, so she's probably eating 1k or just over right now and calling it a day. It'd be higher if she's pacing around in her room for exercise, which she may be doing given that she's managed to keep a lot of her mobility despite her current state.
