There are six people you can ask so I'll list them.
muerta: she is the Mexican reaper
grimm and reaper: Grimm is the cowboy and reaper is the dog you can ask them separately or together.
shinigami: the Japanese death god.
Wuchang: is the Chinese reaper (if you have another name for him I would love to here.)
anubis: (the half jackle half human death god, but in this he is a she.) she will answer any questions