"You can sponsor:
- brothers or sisters, nephews or nieces, granddaughters or grandsons who are orphaned, under 18 years of age and not married or in a common-law relationship
- another relative of any age or relationship but only under specific conditions (see Note below)
- accompanying relatives of the above (for example, spouse, partner and dependent children)."
it seems I do at least meet the eligibility criteria for sponsoring my sister who is 15 right now? Of course a minimum income threshold is required and I realize that I do have to work on that