In case people were curious about character skills, I'm gonna go one-by-one through and start trying to put info on them a little at a time. Again, I don't actually know Japanese, so these may be a bit off.
九脳 神風 (Kamikaze Kunou)
通常攻撃 (Tsuujou Kougeki) "Regular Attack"
Basic Attack, consumes 2 Attack gauge points
奥義·満月斬 (Ougi·Mangetsuzan) "Secret Technique: Full Moon Slash"
Deathblow, consumes 5 Attack gauge points
Level 2 Attack. Deals 5 times damage
究極奥義·瞬殺 (Kyuukyoku Ougi·Shunsatsu) "Ultimate Secret Technique: Instant Death"
Secret Skill, consumes 15 Attack gauge or while Enraged
Level 6 Attack
九脳抜刀術 (Kunou Battoujutsu) "Kunou Sword Drawing Technique"
Combat Skill, Automatic Activation
Attacking enemies sometimes raises Tension
忍の駆け足 (Shinobu no Kakeashi) "Ninja Run"
Special Ability, Automatic Activation
Increases movement speed of all party members to the fastest
築山 炎武 (Enbu Tsukiyama, purple hair ver)
殴る·蹴る (Naguru·Keru) "Punch, Kick"
Basic Attack, consumes 3 Attack gauge points
決めポーズ (Kime Poozu) "Decisive Pose"
Deathblow, consumes 5 Attack gauge points
Increases the Tension level of all party members
真·決めポーズ (Shin·Kime Poozu) "True Decisive Pose"
Secret Skill, consumes 15 Attack gauge or while Enraged
All party members' Tension increases by two levels and attack power increases
ハッスルダンス (Hassuru Dansu) "Hustle Dance"
Combat Skill, consumes 5 Nin gauge points
Recovers all members' physical strength (health)
鋭い洞察力 (Surudoi Dousatsuryoku) "Sharp Insight"
Special Ability, Automatic Activation
Causes hidden objects/paths to appear when Enbu is the character being controlled
築山 炎舞 (Enbu Tsukiyama, red hair ver)
殴る·蹴る (Naguru·Keru) "Punch, Kick"
Basic Attack, consumes 3 Attack gauge points
めっちゃ殴る·蹴る (Metcha Naguru·Keru) "Real Punch, Kick"
Deathblow, consumes 6 Attack gauge points
Level 3 Attack
炎舞の炎 (Enbu no Honoo) "Enbu's Blaze"
Secret Skill, consumes 15 Attack gauge or while Enraged
Level 7 Attack
限界突破 (Genkai Toppa) "Limit Breaker"
Combat Skill, consumes 6 Nin gauge points
Raises own Tension by two levels
鋭い洞察力 (Surudoi Dousatsuryoku) "Sharp Insight"
Special Ability, Automatic Activation
Causes hidden objects/paths to appear when Enbu is the character being controlled
刀 (Katana)
連続キック (Renzoku Kikku) "Continuous Kick"
Basic Attack, consumes 2 Attack gauge points
くない投げ (Kunai Nage) "Kunai Throw"
Deathblow, consumes 5 Attack gauge points
Level 2 attack. Deals 3 times damage
刀アタック (Katana Atakku) "Katana Attack"
Secret Skill, consumes 15 Attack gauge or while Enraged
Level 5 attack. Deals 5 times damage
ヒミツのお菓子 (Himitsu no Okashi) "Secret Sweets"
Combat Skill, consumes 1 Nin gauge point
Increases own Attack gauge
盜みのハリガネ (Nusumi no Harigane) "Thief's Tools"
Special Ability, consumes 3 Nin gauge points
Open green doors on the field without using a key
鞘 (Saya)
鞘ちゃんボム "Saya-chan Bomb"
Basic Attack, consumes 3 Attack gauge points
忍法·早着替え (Ninpo·Haya Kigae) "Ninja Art: Quick Change"
Deathblow, consumes 6 Attack gauge points
Shows order in which cards should be turned (for a random number of rounds)
鞘ちゃんの愛 (Saya-chan no Ai) "Saya-chan's Love"
Secret Skill, consumes 15 Attack gauge or while Enraged
All members recover physical strength and vitality as well as eliminating weakness effects
鞘ちゃんサポート "Saya-chan Support"
Combat Skill, Auto Activation
Someone's attack power rises at the start of combat
ライフサポート (Raifu Sapooto) "Life Support"
Special Ability, Automatic Activation
Recovers physical strength (health) of the character turning over the cards in combat