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.)
Abe Nana
プリプリウサミン
3178 3822 5770
ゴーゴーメルヘン Every 9 seconds: there is a 40..60% chance that you will gain an extra 18% combo bonus for 4..6 seconds.
Jougasaki Mika
ハート★オーバーフロー
4249 4141 4790
ドリーミングサイン Every 9 seconds: there is a 40..60% chance that Great/Perfect notes will receive a 17% score bonus for 4..6 seconds.
Domyoji Karin
大器晩成
3355 3233 3965
せいいっぱい Every 14 seconds: there is a 35..52.5% chance that Perfect notes will restore 3 health for 5..7.5 seconds.
Wakiyama Tamami
小さな自信家
4827 3084 2526
一刀の想い Every 9 seconds: there is a 35..52.5% chance that Nice/Great notes will become Perfect notes for 3..4.5 seconds.