I feel like the definition of "casual" is broad and unhelpful.
For example, theres >>10118814
, an ETC/Leur Getter type coordinate which was considered Otome until recently, which usually has minimal or no petticoat, and different legwear and accessories.
Or theres coordinates like (>>10119432
) or pic-related, wearing ambiguously lolita items released by lolita brands, like salopettes.
) or (>>10119504
) which seem like full lolita coordinates to me, just using knits or cardigans instead of a blouse. I don't see what makes this casual beside the lack of blouse.
Then there is (>>10119449
) or (>>10118806
) which are more the normal definition of casual lolita as defined during the daily lolita years, a skirt and cutsew or knit, combined with normie elements like sneakers or a normie t-shirt.