Is it troublesome to deposit money in my sister's name with a bank card?
If you only deposit or withdraw money, it is generally possible, and ATM is also very convenient. Of course, ATMs don't need signatures. You must have that card.
If you use your card for a long time or do business, you'd better use your own. Because the counter usually needs me or my agent and my ID card. There is also auditing. There will be trouble anyway.