Bell

A wicked one-winged angel appearing in the Collab Scenario. She comes from Parade Buster with Lest, Musette and her partner Lyla.

Biography
She first appears near the end of chapter 3 with her partner to attack Lest and Tarsa under order from the Queen of Dreams. They lose, but reappear a bit later when they reveal that Musette has brainwashed the Grand Noah Queen, and incapacitate Lest to imprison him while using Tarsa for nefarious purpose.

She shows up again with her partner and her boss during chapter 8, when Kazuya's party has beaten Fulbeua. As Musette orders Fulbeua to dispose of her, Bell and Lyla are shocked by the insolent nightmare who refuses to act and who resist Musette's brainwashing. The conflict allows the party the time to escape.

She reappears again during chapter 12 when the Alliance of the Queen of Dreams prepare her plans. She, Musette and her fellow consider themselves the only ones really loyal to Est, and thinks of the others as nothing more than lowly misfits.

The trio returns one last time in the post collab, where they got to Snow Shrine with Daimyokai in hot pursuit. The party meets them at the entrance, and after a fight that ends in the hero's favor, the Grand Noah Queen says they have no choice but to recruit them in the Pocket Castle as guards wouldn't be able to resist their brainwashing techniques. As Musette accept to join the hero's group, both Bell and Lyla oblige out of loyalty for their leader.

Monsterpedia entry
"A being who arrived from another world. Further Details are unknown."

First Battle

 * Attack
 * Deva's Palm
 * Magi's Unite
 * Gale
 * Melty Kiss
 * Proselyting Fellatio
 * Chest of Paradise
 * Croch Trample
 * Sexy Dance

Chapter 3
With a party of two, the options are quite limited.

Lest will be the main damage dealer thanks to his heroic skills. As they have extremely limited crowd control, charging attacks to fully exploit his potential is possible.

On lower difficulties, they can be reliably stunned by Tarsa's scream for two turns. Afterwards, the latter's role is just to keep Lest alive and buffed.

First and Second Battle
This time, she appears with Lyla and Musette. Fighting the trio can be tough thanks to their numerous status effects. Preventing them can help keep a steady damage flow and make sure your healer is always at the ready. They have different weaknesses, but they don't cover each other, simply avoid using holy, dark, wind and pleasure attacks if you target the whole party.

It can be worth it to focus on Lyla with Ice Spells as she can use a party-wide heal. She doesn't use it on a regular basis, but removing her from play both reduce the damage and can prevent the fight to drag on.

The second battle is identical, except they all have +100 to their stats, making them slightly more dangerous.