Answer

In an upashraya, generally Sadhu and Sadhvi stay.

Explanation

The Panch Parmeshthi are:

1. Arihant
2. Siddha
3. Acharya
4. Upadhyaya
5. Sadhu

An upashraya is mainly the place where Jain monks and nuns reside for spiritual practice, study, and discourse. So, from the Panch Parmeshthi, the one directly associated with upashraya is the Sadhu Parmeshthi.

Spiritual Understanding

The upashraya is a place of discipline, purity, and साधना. It supports the जीवन of renunciation and spiritual study.

Takeaway

So, if you mean “who stays in upashraya?” the answer is: Sadhu and Sadhvi.