Here are the main Jain primary sources you can study for Padmavati (Padmāvatī), the yakṣi of Parśvanātha. I’ve kept to sources commonly cited in Digambar and Śvetāmbara traditions and noted the tradition-specific differences.

• Bhairava-Padmāvatī-kalpa (Kalpa text)

- A ritual manual dedicated to Padmāvatī, associated with Digambara traditions. It lays out moral qualities, purifications, and mantras for worship of Padmāvatī. - This work is cited as a key source for ritual practice and tantric aspects of Padmāvatī worship.

• Tiloyapannatti (Digambara literature)

- An early Jain cosmology text that, among other topics, lists yakṣa-yakṣi pairs and helps establish Padmāvatī’s place in the pantheon as Parśvanātha’s yakṣi. - Important for understanding how Padmāvatī is positioned within the broader Jain universe.

• Pravacanasāroddhāra (Nemicandra, Śvetāmbara tradition)

- A major Śvetāmbara work that contains systematic listings of the 24 yakṣas and 24 yakṣīs, including Padmāvatī, and their roles and attributes. - Useful for comparative study of how Padmāvatī is described across sects.

• Kalpas (general reference in Jain literature)

- Various Kalpa texts (and related ritual manuals) mention Padmāvatī as the attendant goddess of Parśvanātha, with varying iconography (four arms, vahana, etc.) and attributes between Digambara and Śvetāmbara communities.

Notes on tradition differences

• Digambaras often emphasize Padmāvatī with Dharanendra as a linked pair and may describe her vehicle and iconography differently from Śvetāmbara sources.
• Śvetāmbaras frequently align Padmāvatī with the snake canopy and may have slightly different ritual emphases in festal worship or temple placement.

You can read a concise overview of Padmavati's role, temple placement, and worship sequence in Jain practice here:

• Padmavati devi pooja sequence (Digambar/Śvetāmbara notes and practical differences).

If you want a quick, focused start, I can tailor a reading plan pointing to the exact passages in Bhairava-Padmāvatī-kalpa and Pravacanasāroddhāra once you tell me whether you follow Digambara or Śvetāmbara traditions.