Here is a quick guide to what you asked about, with simple explanations you can share with others. I can’t display or fetch photos here, but I can help you identify which kinds of images to look for and where to find authentic Jain imagery on Jain Knowledge resources.

• Acharya

- Who they are: The head monk of a Jain monastic order; spiritual and administrative leader. - Photo cues: Senior monk in traditional white or ochre robes, often with a distinguished demeanor, sometimes seated in a teaching or ceremonial setting.

• Upadhyaya

- Who they are: A senior monk responsible for teaching scriptures and leading study; a distinguished scholar-monk. - Photo cues: Monk in robes with books or scriptures, often in a teaching or discussion context.

• Sadhu

- Who they are: An initiated Jain monk (male) or nun (female) who practices ascetic discipline. - Photo cues: White or ochre robes, shaved head (anupurna), often in meditation, alms round, or simple devotional acts.

• Arihant

- Who they are: A liberated soul who has conquered inner passions and attained kevala jnana but is not yet worshiped as a mortal teacher. - Photo cues: Representations are often in statue or icon form, sometimes depicted with a strong, luminous presence; may be shown in meditation or in the path to moksha.

• Siddha

- Who they are: A perfected soul who has achieved complete liberation; the ultimate spiritual state. - Photo cues: Similar to Arihant in iconography, typically shown as a serene, enlightened figure, often in a liberated, multi-lingual devotional context.

Tips to find authentic images

• Look for images that depict the proper attire, demeanor, and contexts described above (monastic settings, study scenes, meditation, or iconography).
• Prefer images from credible Jain temples, museums, or education organizations that focus on Jain Dharma.
• If you’re seeking labeled photos (e.g., Acharya-in-silhouette, Upadhyaya lecturing), check for clear captions that identify the role and context.

If you’d like, tell me how you plan to use the photos (e.g., teaching material, exhibition labeling, a devotional article), and I can help craft brief, respectful captions and short arth for each image type in keeping with Jain tradition.