Every Monika expression
Monika comes with 20 face variations pulled straight from the game, covering club president — calm, direct, and the one everybody quotes.
Open the Expression tab and every face shows up as a thumbnail — you pick by looking, not by guessing at file names. Switch outfits and poses from the Pose tab: her school uniform, the leaning pose, plus the old-art and glitch styles.
Writing lines that sound like Monika
The text box fits three lines, and short lines read better at thumbnail size — something like "Ehehe~ did you write a poem for me?" is about the right length.
The line counter above the input tells you when you're about to overflow, so nothing gets silently cut off when you export.
Put her in a scene with someone else
Tap "Add character" in the Character tab to put more people beside Monika — another club member, the protagonist, whoever — then snap them left / center / right, or use the sliders to move and resize each one.