This time his hair actually turns black, and his eyes turn blue, and he opens his mouth - 

winces, realigns his jawbone with an uncomfortable crunching sound - 

- and says, "I owe you several apologies, I think." 

Meanwhile:

Basically everyone in the year who's not scheduled to be in Astronomy right now (Carter, Gadlen, the Vector twins) and doesn't have a free study period instead (Bones, Snape, Wilkes, a few others) is supposed to be in Charms. They're usually not scheduled on top of each other, but this year there's no overlap and the next best physically possible overall schedule was in all other respects worse. 

A weird number of them aren't, though: Evans, who definitely signed up for Charms and is nowhere to be found; Kovachev, who is apparently having some kind of medical problem; and Hall, who apparently was last seen making unhinged Slytherin-related choices for no discernable reason. The second two things might be related, since they're roommates, but it's sort of hard to see how.

"Good morning, good morning! This is NEWT Charms and I am so delighted to welcome all of y--" 

Flitwick stops. He leans forward from his perch on his desk, squinting. He consults his classlist. He puts on his spectacles, just to be quite sure. 

"--some... of you?" he corrects, worriedly. 

"Uh, Sasha's in bed with a migraine but he's not like dead or anything," volunteers the remaining Hufflepuff in the room, Dáithí Moran. "Daniel's probably on a friendship quest?" 

This is a common Hufflepuff phrase meaning actively engaged in trying to rescue someone from evil by the power of friendship, a thing they do all the time. 

"Lily is um. On a non friendship quest. I think." 

Did he miss her explaining this while his brain was full of exclamation points? Heck. Immediately failing at being the best boyfriend ever. Gotta work on that. 

So, the thing about trying to solve the future from the vantage point of 1981 is that you know the identities of a lot of Death Eaters,  but continue to have absolutely no earthly idea how to defeat the bloody Dark Lord. She has tried. Multiple times, even! With James right there! With Dumbledore right there! And yet! 

Accordingly Lily's priority is not, actually, killing Voldemort. 

Ninety minutes after she exits the grounds of Hogwarts, an insistent alarm goes off in the Auror Office, indicating that somebody in a registered wizarding residence with standards-compliant wards has just called for help. 

Amelia Bones squints at the map. "Am I hallucinating," she says, fascinated. 

     Alastor Moody casts a half-dozen charms on her to check, just in case. "No," he says, frowning. He doesn't really have a 'surprised' setting, just 'alarmed.' 

"Okay," says Amelia, slowly. "Well, I suppose-" 

     "Wait, wait," interrupts Emmeline Vance, "surely you are not seriously going to-" 

"Vance," she snaps, severely, which causes Emmeline to stop talking in alarmed surprise, because the Director normally addresses Auror trainees, with personal fondness, by first name. "The Auror Office does not take sides. Any wizard within the borders of the Isles who calls upon us for defensive aid is entitled to receive it." Not that this doesn't sometimes stop them from retreating to a man to Avalon and causing all parties to an unapproved war to receive no aid because there is nobody in the office at all, but they are not there, yet. 

      "....right," says Emmeline, uncomfortably, "but, Director, the Lestranges--" 

"Technically they're French," volunteers Andrew Waffling, helpfully. 

      Mad-Eye starts cackling delightedly. 

Amelia throws up her hands. "You're doing the paperwork if they sue." 

     "With any luck they won't survive to do any such thing," says Emmeline, grinning. There's quite a number of red lights blooming around the Lestrange estate on the detectors now, not only an alarm but also a fair number of illegal curses. Which means they're pulling out all the stops against whatever it is just decided it wants to wipe them off the map.

"Please don't say things like that in the office," sighs Amelia.  

     "Sorry, sorry." 

(Certainly she is not casting any illegal curses. It's all them. Where would a poor innocent Muggleborn witch have learned any of those? :) :) )