Based on your statement, it seems like you simply borrowed or used someone else's Crunchyroll account without changing any login details such as the email or password. In the context of being a "leecher," this would typically fall under the category of unauthorized account access or sharing. Using someone else's account without their permission or proper authorization is considered unethical and can be a violation of terms of service.
To avoid being labeled as a leecher or engaging in unauthorized account access, it is important to respect the terms and conditions set by the service provider. If you wish to enjoy the content on platforms like Crunchyroll, consider subscribing to your own account to support the creators and ensure that you are accessing the content in a legal and ethical manner.