How does the carer's allowance affect the care receiver's payments?

A friend, whom I live with, is on the Disability stream of the study payments. Due to them needing supervision for schizophrenia, borderline personality disorder and suicidal ideation I have had to quit work to look after them.

If I try to claim any kind of carer payment, will that negatively impact on the payments they receive from Centrelink? Neither of us really have an income, and I don't want to jeopardise their income for the sake of my own.