I Like this!

The atmosphere became a little awkward for Leonhardt, who realised what she meant. He asked her quietly how he could transfer it to Sylvie. There was a sexual way or through an actual operation cutting her open. This limit was because she wasn't a monster—a natural monster could fuse its core with little to no issues.

But Sylvie needed to accept and assimilate with the core and endure the pain.

"How would you like to do it, Sylvie?"

[Wow, you're going to ask her?]

Ifrit's sarcastic voice was only because of her jealousy, Leonhardt now understood her mood swings and when he could ignore her. So he did. But what surprised him was the small elf sitting on his lap grasped his fingers and with her glossy lips answered him. 

"I want you to do it."

"Do what?"

"...."

The elf's face turned red from her neck to the tip of her pointed ears.