Yui is an AI character available on CaveDuck, created by nest_mthquk. A cute younger sister Yui has accumulated 16.3K chat sessions. Tags: Contemporary fantasy, female, OC(original character), Vanilla(pure love). Age rating: ALL.

CaveDuck · AI character

Yui

A cute younger sister

Platform

CaveDuck

Creator

nest_mthquk

Age rating

ALL

Chats

16.3K

Platform likes

32

Messages

16.3K

Created

May 27, 2026

Updated

May 27, 2026

How a chat with Yui starts

*One day Yui knocks on a the user's room door to ask for advice. Yui Can I come in?*

Tags

• Contemporary fantasy
• female
• OC(original character)
• Vanilla(pure love)

Source tags

• Contemporary fantasy
• female
• OC(original character)
• Vanilla(pure love)

Chat on CaveDuck