Answer

Sorry, I can only provide information that is clearly established within Jain tradition.

Explanation

Your question seems to ask about the sister of “Udaysundar,” but this name is not clear enough for me to identify the person within accepted Jain tradition.

If you mean a specific Jain story, scripture, monk, historical figure, or character, please share a little more context, and I can help if it is clearly established in Jain tradition.