All the main characters of Orrendi per Sempre (hideous forever) an Italian cartoon series based on a children's book, by Aquilino Salvadore.
Example episode:
https://www.youtube.com/watch?v=yKbze4JynpwThread from 3 weeks ago:
https://boards.fireden.net/co/thread/125482528Quick summary:
Four characters, boys in the book, but two girls and two boys in the animated series:
- Shock: produces a shock whenever he has feelings
- Death: drops body parts and replaces them carelessly
- Albein: boy-genius but cannot use his legs
- Macabre: has never-healing wounds