That spiritale Sakura Miku scale figure is on preorder now... I can't decide if I should buy her or not
桜ミク ~桜妖精ver.~ | spiritale公式通販
岩十さんが描き下ろした桜ミクを1/7スケールで立体化!桜ミクのスケールフィギュアは物販としては初登場となります!華やかな桜の木の枝に腰かけて歌う、妖精のような桜ミクを細部までこだわって作り上げました。
spiritale.jp
Miku already did a collab with one of the Japanese airlines. There could be some really nice art motifs in the terminals and things if they went that route, though it probably wouldn't/shouldn't be super-heavy, obviously. If nothing else, I could imagine maybe some painted swirls that bring her tails to mind on the walls, maybe some turquoise accents/paint on the walls, and a statue somewhere. A life-sized Miku statue did occupy one of Japan's airports for awhile awhile back, actually.