BigCozyOrca/BCO is primarily known for their watercolor-like and pastel style. They first started posting art on Twitter under their current name in September of 2021. Despite featuring a variety of different orientations and genders, their art mostly focuses on trans women characters. BCO's fursona and most featured character is pastel_(bigcozyorca), a shapeshifting orca colored light yellow that gradients into light blue.

Their Twitter is no longer being used to upload art. Their primary social media is BlueSky and their gallery site is Itaku.