How do you get the character token in Lego Harry Potter 5-7 last level when fighting nagini?

In the last level of LEGO Harry Potter: Years 5-7, to obtain the character token for Nagini, you need to defeat her during the boss battle. After depleting her health by using spells, she will drop the token. Make sure to switch characters to collect it before it disappears. Additionally, ensure you are using the right spells to fend off her attacks and protect yourself during the battle.