Human characters in the Chipmunks Adventure have a vaguely Aeon Flux-esque feel?

Louise Zingarelli was the character designer. I first met her when I worked for Ralph Bakshi on Fire and Ice. She was a huge instpiration and influence. You can see her work in Bakshi's films Hey Good Lookin' and American Pop. Also Starchaser. Very tragically she passed away too soon.

I wonder who else she influenced! There’s a strange out-of-time quality about these in particular...

Interesting tribute from
https://animationresources.org/biography-louise-zingarelli/

At Bagdasarian, we shared an office. I think I was the only person who ever survived sharing an office with Louise. One day, I gave her an incidental character to design. She sat around sipping her coffee and smoking casually. I finally asked her if she was going to get around to doing the drawing, because the deadline was looming. She said, "Here’s a good bet. Get your watch out. I’ll design this character in one minute. You take the sketch to Ross for approval. I betcha two bits he not only approves it, he says he LOVES it." "You’re on!" I said.

So looking at my watch, I called out, "Ready… set… GO!" Louise just sat there smiling at me. I said, "Time has started." She nodded and set her cigarette down… smoothed out her paper… "Twenty seconds." I called out. She sat down and set in to work on the drawing. Her pencil flew over the paper- beautiful sweeping lines, completely original shapes. She finished the character with time to spare and tore it off her pad. I took the sketch next door to Ross’ office. He was on the phone, so I left it on the corner of his desk and went back to Louise. She was smiling like a Cheshire Cat. A couple of minutes later, we heard from the other side of the wall, "FAAAABUUULOOUSS!" Louise casually raised an eyebrow and quietly said, "Pay up."

This is among the coolest things I have learned all year.