Beast and Belle arrived in the castle ballroom as they started to dance. 

https://youtu.be/xDUhINW3SPs

Play from 1:58-3:20...

(Y/N): I think we may have come at a bad time. 

Sora: On the bright side, there are no Heartless and Nobodies in the area. 

(Y/N): True. That is a good thing. 

But then- 

???: You just don't know when to quit. 

Xaldin appeared. 

Yang: Hey ... you're ... 

(Y/N): Xaldin! 

Donald: We'll show you! 

Beast then saw him! 

Beast: OUT OF MY CASTLE! NOW!!! 

Belle: Not tonight!

Xaldin just snapped his fingers and Dragoon Nobodies appeared! 

Team (Y/N): AGH! 

You guys take them out along with Beast's help! 

Xaldin: Yes. Let your anger grow...

He then disappeared. 

Beast: NO! 

He then ran out. 

Weiss: What's wrong? 

Belle: Let's follow him! 

You all follow Beast to the West Wing. 

Belle: Beast, please calm down. 

Beast: Calm down!? You just had to have a party, didn't you? Don't you see what's happened?

(Y/N): Woah! Easy there Fuzzball. What happened? 

Beast: The rose! He took it! 

Goofy: What? 

Ruby: Isn't that what you guys need to break the spell? 

Belle: But surely, you can find another rose...

Beast: Silence! You don't know anything!

(Y/N): HEY! Don't take it out on her! I know you're upset given what's going on, but she didn't do anything! 

Beast turned. 

Beast: I ... I'm sorry. I- Just leave, please. 

Belle: Beast? 

Beast: Belle, you know how I was like before. I tried to change. But I was only fooling myself. I can't be any different. I'll always be a beast. So, I should live like a beast. With no one, alone. Goodbye, Belle.

Belle: You can't mean that...

She tears up and leaves. 

(Y/N): Hey! Wait! 

You guys then run into Lumiere, Cogsworth, and Mrs. Potts. 

Mrs. Potts: Poor child...

Cogsworth: How could it have come to this?

Lumiere: And they were so looking forward to this evening...

Mrs. Potts: Now, now---no need to be so sad. Once the rose is back safely, this will all be over.

Sora: Why is that rose so important? 

(Y/N): Is it tied to the Enchantress' curse? 

Lumiere: Oui mon ami. There is a time limit. He must find his true love before the last petal falls from that rose.

Cogsworth: Ah, but that is not all... Over time, caring for that rose has become a cherished part of the master's daily life.

Mrs. Potts: It's as though all his hopes and dreams are tied to that single bloom...

(Y/N): Poor guy. Come on! We have to find that rose! 

Yang: But what about Mr. Grouchy Pants? 

(Y/N): I got this. 

You march to Beast. 

(Y/N): Let's go Beast! 

Beast: Go away. 

(Y/N): You used to be fearless. You would have given your life to save Belle. Don't you know what that meant to us? You gave us all courage. Hmph, maybe you should have kept some for yourself. I mean, are you really gonna throw your happiness away? The rose is your only hope, isn't it? Well, it's the only hope for Cogsworth and the others, too. So, don't throw away your last chance. Remember what it was like before Belle lived here?

Beast: Yeah. I do. 

(Y/N): Are you going to let some Nobody walk all over you? 

Beast: NO! 

(Y/N): Are you going to rip him apart? 

Beast: YES! YES! XALDIN WILL NEVER BE WELCOME IN MY CASTLE FOR AS LONG AS I LIVE! 

Soon... 

Beast joined the team to the entrance hall, and- 

Xaldin: Look who showed up. You had me worried. I was afraid you'd given up for good.

Sora: What do you guys really want?

Xaldin: ...Kingdom Hearts. When Kingdom Hearts is ours, we can exist fully and completely. So you see, Beast---that's why we need your Heartless AND your Nobody!

Beast: I don't care about what you say! GET OUT NOW! 

Xaldin: Very well. Though I'd rather travel light. 

He then brings out- 

Beast: BELLE! 

Belle was being held hostage, and he also had the rose! 

Xaldin: Which is more important to you? Belle or the rose? 

Ruby: HEY! YOU CAN'T DO THAT! 

Blake: What do you expect? He doesn't have a heart or a soul. 

Beast: BELLE! 

Belle then elbowed Xaldin in the stomach and grabbed the rose! 

Belle: I GOT IT! 

Yang: YEAH! YOU GO GIRL! 

(Y/N): HA! What now, Xaldin? 

Xaldin: Guess I have no choice. 

He summoned his lances through strong gusts of wind. 

https://youtu.be/03CL2wiHr_A

Xaldin started to attack hard with his lances, though you and Sora went into Valor form and did a combo attack against him! 

However, Xaldin started to do downward stab jumps, though this did little to deter everyone else. 

Team RWBY dodged and attacked when possible with Yang breaking his defense, Ruby running a tornado around him and knocking the lances back, Beast brutally slashing when he found an opportunity, Blake and Weiss using Goofy's shield to charge in and strike, and then Donald casting a Mega Flare on Xaldin! 

The lance-wielding assassin kneeled down as his lances were shattered. 

Xaldin: Is ... this ... the end? No ... No .... NOOOOOOOOOO!!! 

He faded away, with nothing of him left. 

Yang: HA! We beat another Organization Member! Ha! How do you like that Xemnas? We can kick your asses all the way back to where you came from! 

Blake: Don't taunt them Yang. 

Belle then came in with the rose. 

Beast: Belle...

Belle: I know. You want me to leave the castle.

Beast: What matters is... You weren't hurt by Xaldin... You're safe. And... I'm very grateful to you...for bringing the rose back to me. Thank you.

Belle: It's the least I could do. 

Beast: Listen, Belle...

Belle: Yes?

You all nod. 

(Y/N): Go on. It's okay. 

Beast: Belle, I'd like you to stay... With me... Please?

Belle just hugged him! 

Belle: YES! 

Lumiere: Maestro? 

The music picked up again, and Beast and Belle once again danced.