If you want to remember which cards live in which holders, personal notes on each card in SetScribe work great for that
Overall, the Pocket game looks to be an innovative step forward for a Trading Card Game that has never failed to adapt
Though she has a cost of 7 Ink, Clarabelle is a Floodborn character, which means that she has the Shift keyword, allowing her to be played directly on top of another Clarabelle card, for a reduced cost (in a manner reminiscent of how evolving works in Pokemon)
However, in the Pokemon collecting world it's common practice to try and negotiate better prices, especially if the vendor's sticker is a bit above market or if you're buying a lot of items
Even though Japanese cards typically cost less than English cards due to the latter being widely preferred by collectors, this card is an exception to the rule
My suggestion would be to move this card to five mana, where I think its still playable but not a must-play