Beyblade X Episode #75 (Season 2) (April 4, 2025)

75) The Return of the Knight
リターンオブナイト
Ritān Obu Naito
Air Date: April 4th, 2025

Multi Nanairo of Team Persona returns from her Beycraft training at the Animal Castle with a full heart. While Reiyu tries to cast a curse on her, Multi shows her a new Bey and smiles at her wryly. After the training, Multi has regained her self-confidence and has found the answer to why she wants to make Beyblades.

Then comes the decisive battle, in which one defeat will determine Persona's defeat. The battle between the knight and the ghost reaches its climax while the Manju Family watches Multi through a live broadcast of the battle!

Source: Animedia Magazine
This might be Multi's come back & Mail Knight (Knight Mail) 3-85BS' debut in this episode, where Ghost Circle get beaten by it like in the eighteenth & Nineteenth chapters.
Here is a video on this episide showing Multi holding her new UX Bey, Mail Knight 3-85BS in her hand for it debut match with Ghost Circle:

So excited for Multi's return! The battle sounds intense!
The new OP is cool. Ending is alright, but Cosmic Treat continues being the peak.