Thanks for bearing with me through the downtime and/or late updates. The core issue behind both has (hopefully) been resolved, so things should be stable now.
Card Rarity X X X X
  SSR SR R N
High stat X X X X
  Vocal Visual Dance Balanced
Idol Attribute X X X
  Cute Cool Passion
Skill Type X X X X X X X X X X X X X X
  Perf. Lock* C. Guard Combo Bonus Score Bonus Healer H. Guard Overload All-Round Concen. Skill Boost Focus/Coord. L. Sparkle Encore T. Synergy
Awakened?   X
  Yes No

(Short link)

Click on an underlined table header to sort the table by that value. Do note that you should apply filters before using the skill-based sorts, as you can't really compare skill effects.
Card VoViDa Skill Effect (sort: time window, % chance, duration, effect val.)
Kobayakawa Sae
華ほころびる宴
3856 5968 3174
想い紡ぐ紅 Every 9 seconds: there is a 35..52.5% chance that you will gain an extra 18% combo bonus for 5..7.5 seconds.
Yorita Yoshino
ことほぎの祈り
3190 3867 5947
春を呼ぶ舞 Every 6 seconds: there is a 35..52.5% chance that 9 life will be consumed, then: Perfect notes receive a 18% score bonus, and Nice/Bad notes will not break combo for 3..4.5 seconds.
Takafuji Kako
幸運の女神
2656 4857 3202
ラッキーガール Every 6 seconds: there is a 35..52.5% chance that Perfect notes will receive a 15% score bonus for 3..4.5 seconds.