Each Touhou monster has "Touhou" in its name, to make it easy for support cards that affect or require a "Touhou" monster.. Several gain or enhance their effects when other related Touhou cards are on the field. Many have self sufficient effects that can prove useful even in the official TCG in other decks, not just "Touhou" based ones.
A few cards, such as "Touhou - Komachi Onozuka" introduce an idea of sending a card to the Graveyard face-down. Such cards cannot be flipped face-up or removed from the Graveyard.
In any case, here is the current list of cards in this set, and more will be added in the future. If there are any too hard to read, please let me know so I can type out its effect. Lemme know what you think or any lore fixes that need to be done. Please rate them as well. Thanks.