Thomas & Friends: All Engines Go
Riff and Jiff (Riff voiced by Addison Holley in the US (UK; 2021) and Jiff voiced by Evany Rosen (UK; 2021), both voiced by Jessica Caroll in the UK (2022-present) ) cheerful engines who act very friendly towards other competitors alike. Even when anything goes wrong for them, Riff and Jiff still act very positive.