Question: I have already introduced a 2nd major character but in the 9/10th chapters i am introducing a group of them. Is there an easier way to introduce them to the protagonist. But not from them going "my name is ..." or something along those lines.Answer:
Think about situations where you meet a group of people for the first time. There are some formalized settings where everyone goes around a circle in a formal way introducing themselves (perhaps at a class or a 12-step program).
Other times you may gradually and casually get to know people, for instance at a party or disco. You might get introduced to one or two people by your host at the start then later introduce yourself to someone else, or they introduce themselves, or their friend, etc. All this happens as you naturally meander your way through the setting.
Maybe you start a new job and it takes a while before you get to know everyone in the place, perhaps over encounters in the lunchroom or elevator. Maybe someone takes it upon themselves to tell you all the stories about everyone. Maybe one character avoids meeting you, so you have to go out of your way to introduce yourself. Maybe you only observe a particular character from a distance for the longest time.
In other words, put yourself in the shoes of your main character and imagine how that person would naturally come into contact with the other characters and interact with them for the first time.
Keep in mind that, if there is no natural reason why the main character should meet another character, that may mean it's too early for the introduction.