I’m not finding any reliable information about “Mehulabai Mahasatiji” and her Gurudev in the sources available to me, and I must not guess about a sadhviji’s guru–disciple lineage.

Because many Jain sadhvijis have similar names (often differing only by guru‑paramparā or local usage), this kind of detail is best confirmed directly from:

• The sangh / sampradāy she belongs to
• The local Jain upāśray / derāsar where she regularly stays
• Any official publications or pravachan recordings of her sangh

They will be able to give you her full name, sampradāy, and Gurudev correctly and respectfully.