141. Śāntā
She is peace personified.
The nature of bliss in its ultimate closest explanation appears to be utter tranquility and peace.
Source: Śrī Amṛtānandanātha Sarasvatī "Sudhā Syandinī Bhāṣyaṃ" Typed Manuscript
(an incomplete commentary on Lalitā Sahasranāma)