Kongai/YMMV


 * Ensemble Darkhorse -- Popo is a character with very low max HP (60) and his/her best attack has a base damage of 20, with a 60% chance that it will even hit the enemy. However, if it hits, then five times out of six it will be a critical hit for triple damage, possibly killing or at least mortally wounding the enemy in one turn. The ultimate chance of that happening is 50%, so the attack is basically "all-or-nothing - pray the coinflip succeeds".
 * Popo's other moves include an attack that does a piddling 5 damage for 20 energy, called Poison Dart. 20 energy is the standard amount regenerated each turn, so the move can be spammed endlessly, and at both ranges. It has, again, a 50% chance to deal a hefty 40 poison damage as a 4 turn DoT effect. A third move is a self-buff that tacks an additional 12 poison DoT damage onto all of Popo's attacks... with a 30% chance to heal Popo for 25 HP. Popo's innate ability is basically a 25% chance to completely dodge any physical attack. As such, Popo relies so much on chance that he/she can be either an incredibly damaging, hard to hit character, or a completely useless card unable to deal any real damage. It all relies on luck.