warui ninja
Warui means bad or mean
In Japanese "pink" is ピンク (pinku) and "ninja" is 忍者 (ninja), so to say "Pink ninja" it is ピンク忍者 (pinku ninja).
Kunoichi.
my family
Ninja is already Japanese. In English it is 'Shadow warrior', it is equivalent to assassin or secret agent.
黒忍者 Kuro ninja
忍者の虎 Ninja no tora
hoko notnay
shinobi- also means ninja
忍者な猫 (ninja na neko) would mean "ninja cat".
"This is bad." = "taihen desu."
I think they were called ninja ( Shinobi) because ninja stole stuff (etc; took) as a thief would.
Josei no ninja o sagashite Improvement: くのいち /ku no i chi/ means 'female ninja' and can be replaced with 'josei no ninja'.