Pandora/Relationships

Regulus Corneas
It would be safe to assume that Regulus and Pandora had a normally cordial relationship, with Regulus even addressing her as the honorific "sama" (although this may be due to her being a higher ranking Witch Cult member.) She showed no ill-will toward him when he attempted to murder her in his rage, and simply sent him back to his mansion.

Petelgeuse Romanee-Conti
Pandora seemed to hold a certain amount of respect for Petelguese, for his desire to protect those he loved. She commended him for forcing the Witch Factor of Sloth to accept him as it damaged his insides, and is the one that gave him the title of Sin-Archbishop of Sloth.

Emilia
Pandora acted rather friendly to Emilia, stating how she had no desire to harm anyone needlessly. This was all a ruse however, to trick Emilia to opening the seal of Elior Forest. When Emilia witnessed how she tricked Petelgeuse into murdering Fortuna. This drove her into rage and repeatedly killed Pandora, who attempted to calm her, and was disappointed at how her actions had the opposite effect intended on her.

Echidna
Unlike the rest of the world, Echidna seems at least be acquainted with Pandora, describing her to be the Witch of Vainglory to Emilia during her trial. However, she is dismissive of Pandora's power, claiming that it made her an expert at saving her own skin.

Theresia van Astrea
Pandora seems to have played some part in Theresia's death at the hands of the Hakugei. Afterward, she reanimated her corpse to serve the Witch Cult.