How can I make a repeat until loop?

EDIT: I apologise for the missing comments and programming language. Thanks for the help, I won’t do the same mistakes again.

complete newbie here. I wanted to make the user enter a name that matches one of the names in the dictionary, else the program asks again until a correct name is entered. Here’s the code:

class Yakuza:
    def __init__(self, name, clan):
        self.name = name
        self.clan = clan
        
    def present(self):
        print(f"Hello! I am {self.name} from the {self.clan} clan!")
        
user1 = Yakuza("Kiryu", "Dojima")
user2 = Yakuza("Nishikiyama", "Dojima")

Startup = input("Welcome to Yakuza 0! Press Enter to start.")

character_dictionary = {"Kiryu" : "Dojima Clan",
                        "Nishikiyama" : "Dojima Clan"}
print(character_dictionary)

character_select = input("Select your character: ")

while character_select in character_dictionary:

    if character_select == "Kiryu":
        user1.present()
            
    elif character_select == "Nishikiyama":
        user2.present()
    
    else:
        print("This character is not available. Try again")

I expected the loop to work until a correct name is entered but it keeps going forever. Also, does it matter whether the character_select input is in or out of the while loop?

>Solution :

class Yakuza:
    def __init__(self, name, clan):  # Fixed __init__ typo here
        self.name = name
        self.clan = clan

    def present(self):
        print(f"Hello! I am {self.name} from the {self.clan} clan!")
    
user1 = Yakuza("Kiryu", "Dojima")
user2 = Yakuza("Nishikiyama", "Dojima")

Startup = input("Welcome to Yakuza 0! Press Enter to start.")

character_dictionary = {"Kiryu": "Dojima Clan", "Nishikiyama": "Dojima Clan"}
print(character_dictionary)

while True:  # Changed the condition here
    character_select = input("Select your character: ")  # Moved inside the loop
    if character_select in character_dictionary:
        if character_select == "Kiryu":
            user1.present()
            break  # Exit the loop after successful execution
        elif character_select == "Nishikiyama":
            user2.present()
            break  # Exit the loop after successful execution
    else:
        print("This character is not available. Try again.")