Just gathered some information about the flowers that senbatsu members are holding all thanks to my mom and some Japanese wotas on twitter, including meanings of those flowers. If there’s any mistake please inform me because I may get some flowers wrong.
Shimazaki Haruka: Blue baby’s breath (青いかすみ草) Flower language: dearest wish/desire, dearest joy, pure heart
Yokoyama Yui: Blue chrysanthemum (青い菊) Flower language: please trust me, noble, true love
Note: for YuiParu’s flowers, because they are blue which are not natural colors of their flowers => the blue color is artificial. And usually in Japanese hanakotoba, artificial flowers like that share 1 meaning “dream comes true”.
Kitahara Rie: Allium (アリウム) Flower language: deep sadness, eternal sadness, kind, courageous Purple Agapanthus/Lily of the Nile (紫アガパンサス) Flower language: arrival of love, intellectual outfits