It is impossible to generalize whether a girl you know personally is reliable or not, because everyone's personal situation and behavioral habits are different. It is recommended to remain cautious and rational in interactions, assess the level of trust through mutual understanding and communication, and ensure your own safety and interests. At the same time, adhere to good online social habits, protect personal privacy and avoid disclosing personal information at will. The most important thing is to stay alert and learn to protect yourself, and when you encounter suspicious or bad behavior, promptly terminate contact and seek professional help.