Yazawa Siblings (and other special cards) in Skillup

As you know, Nico's siblings (and the purple Alpaca) can be used to level up R skills (and Honoka's classmates can level up SR skills and the mothers can level up UR skills)

So, I would like to suggest that they can be added into the Idol Skillup page.

In that case, could you also allow us to add skill levels to the cards?

For example, in this Eli R we can add the skill level.

But we can't edit skill levels of special cards e.g. Yazawa's sister:

Start by locating the Idol Skillup page and the existing handling for editable skill levels on ordinary cards. Compare that behavior with special cards such as Yazawa's siblings, the purple Alpaca, classmates, and mothers. Done means the special cards are available for the relevant skillups and their skill levels can be edited.

Written by the indexing model from the issue text.