Are you asking about RRC 1, RRC 2, or RRC 3? Have you read the IRS guidance for everything you asked (HOH, dependency, support, separate income, all three ERC payments) and have you confirmed if either of these people already got advanced payments of the funds (even if it turns out there is no eligibility)?

No one on the internet can answer all of these questions for you. You have to do the due diligence.