I certainly wouldnt. Never a good idea to keep them in pairs, especially with mixed species. All the cute mannerisms you just described are actually listed in the following tread: https://tortoiseforum.org/threads/signs-of-bullying-in-young-tortoises.188026/Both tortoises are female and are about 3-4 years old, can i leave them together? The russian tortoise likes to follow her and they sleep together too (they live outdoors)