Slime Bess

Slime Bess is a monster that Luka encounters in Chapter 3. She appeared as an ally at the start, assisting Erubetie in taking care of evacuated humans in Undine's Spring. However, it seems as though she had contaminated the spring, thinking that if Erubetie dies, she'd be the new Queen Slime, and that Black Alice has given her power.

Monsterpedia Entry
''“A low class, predatory slime. An extremely self centered monster among slimes, she believes that other creatures exist only for her own simple minded enjoyment. Exploiting her unconscious evilness, Black Alice recruited her. It’s believed that she has secretly attacked many men and women in secret from Erubetie.''

''Though she can easily survive on any sort of meat, she finds devouring humans to be the most fun. Covering her prey with her entire body, the digesting slime paralyzes them with extreme pleasure as she preys on them.”''

Attacks
Jelly Hands: Normal Attack.

Melty Bust: Normal Attack.

Slimy Hips: Normal Attack.

Slime Girl’s Slimy Blowjob: Normal Attack.

*Summon Water Spirit: Makes Slime Bess attack three times per turn.

Amoeba Hold: Binding Attack.

Amoeba Haze: Binded Attack. Hits three times.

Amoeba Drain: Binded Attack.

* Non-requestable technique

Battle Overview
You have two options on buffs for this fight, Gnome for Defense, or Serene Mind. Serene Mind won't do much for you at all unless her water spirit is out, at which point it affords you 100% dodge rating. It's worth noting that while her spirit is active, her bind is inescapable even with Gnome.

If Luka is defeated, Slime Bess will slowly consume his body while draining him of semen.

Evaluation
''“I heard there’s a new food on the market called Slimebait. …Of course, I am referring to you. With both high attack power, and a strong bind, Gnome is your best choice here. If she summons a spirit of water, her attack power will further increase. But you don’t have Salamander, the opposite attribute, yet… Since you have no other choice, you may need to use serene state or Sylph to do your best to evade the damage. In addition, if you lose to her draining move, she will continue to insult you. Not that your end result will be any different… Now go, oh Slimebait. You aren’t allowed to lose to a Slime at this point.”''