The March Hare is never seen in the actual series, but heard over the phone in Alice is Dead 3.
Role in series
The number for his bell emporium (555-7321) is scribbled on the walls of a bathroom stall in the nightclub. If the Rabbit calls it, his voicemail will play, talking about his company and how he is annoyed by people who carry around bells but never actually use them (referring to how The Rabbit carries a bell in all 3 games but does not actually use it for anything). Ironically, it's that same bell that alerts The Queen that the Rabbit is at the nightclub.