Charlotte meets Linus. This may actually be the only strip that features the two of them. Unlike Pig-Pen, who has a similar kind of gimmick attribute, Charlotte doesn't stick around for that long. This may be her last hurrah in fact.
The problem with Charlotte Braun is that she doesn't have much of a personality beyond loudness. Pig-Pen is so comfortable in his own skin that he kind of transcends his gimmick. Charlotte's gimmick lends itself to obnoxiousness though, so as Lucy becomes bossier she kind of steals Charlotte's niche.
Thinking about how Charlotte Braun disappears from the strip leads me to brainstorm completely made-up Peanuts characters who have similar one-note gimmicks. Maybe a girl who has really big hair? One who walks loudly wherever he goes?
I've noticed that this mistake, of assuming the range of one's experience matches that of the breadth of the world, is one that lots of people fall prey to, including myself from time to time.
This is far from the last time Lucy stomps something inches away from Snoopy's nose. There's a memorable bit later where she cures the common cold by having people cough on the ground, then she smashes the cold germs flat with her feet.
I think that counts as a chagrimace, but it's wider than usual, which I think is more from Schulz's developing art style than intent. It might be argued that Charlie Brown, after some earlier strips, is due to have a couple inches knocked off of him, but of course the characters eventually take it slightly too far.
I don't think this is the first time Patty and Violet have teamed up on Charlie Brown, but it's the most egregious example to date, and it only intensifies from here. But: "Charlie Brown lives in a purple house?" That's kind of reaching isn't it?