Leo:
- surprisingly neat handwriting
- commonly writes in cursive (he's a poetic person, okay?)
- needs a ruler to write on blank paper (he only writes in a straight orientation on lined paper)
- does little words in Spanish on the next empty page
- he DOES do messy underlining, though
- uses a pen a lot

Donnie: (kinda based on how I do it)
- ALWAYS puts the date in the margin
- writes really fast, but always comes out clear to read
- everyone is shocked on how fast he takes notes, and then says he's finished when it takes decades for the turtle bros to copy a paragraph, possibly lol
- hates drawing dot points, he'd rather do dash lines instead
- uses a standard pencil, sometimes pacers

Mikey:
- Doodles little stars near every header he writes
- overly exaggerated titles (sometimes) with lots of exclamation marks (e.g, 'my awesome day!!!!)
- writes in generic, handwriting
- uses cute pencils and pens with colourful wrapping
- puts scented rubbers on the end of his pencils
- puts stickers in his book after accomplishment

Raph:
- loves crayons and coloured paper when planning cool things
- has a unicorn/teddy diary (AAAAHH IMAGINE)
- one of those journals with the weather thingy at the top corner
- LOVES BINDER + SCRAPBOOKS
- handwriting is bulky and large (due to his big hands)
- writes in bubbly fonts sometimes