Anyaśeṣatva — The Misdirection of the Soul's Servant-Nature
Anyaśeṣatva ('being-śeṣa of another'; anya = another, other + śeṣatva = the property of being a śeṣa, i.e., an accessory, a dependent, one whose entire existence is directed toward another) names the soteriologically problematic condition in which the jīva's intrinsic śeṣatva — its servant-nature — is directed toward something or someone other than Bhagavān Śrīman Nārāyaṇa.
To understand anyaśeṣatva properly one must first understand śeṣatva itself. In Viśiṣṭādvaita, the soul is not an independent, self-subsisting entity — it is a śeṣa (accessory, that which exists for another's sake, a part whose whole existence is subordinated to the śeṣin who is its master). Bhagavān alone is śeṣin — the one to whom all existence is ultimately directed. The jīva's svarūpa (own nature) is therefore not autonomy but ananyārha-śeṣatva — 'servant-nature fit for none other' — the recognition that the soul exists exclusively for Bhagavān's kainkarya (service). This is not an extrinsic imposition on the soul but its deepest, most authentic identity.
Anyaśeṣatva arises when the jīva — under the influence of avidyā (primordial ignorance), karma (accumulated past action), and saṃskāra (habitual psychological patterning) — directs its service-orientation toward: its own self (ātma-śeṣatva, serving oneself, i.e., kaivalya — self-absorption as an end), toward other jīvas (serving devas, pitṛs, humans, or one's own family as ultimate ends), or toward karma-phala (the fruits of ritual and moral action, treating those fruits as final goods). All three are forms of anyaśeṣatva.
The Āchārya texts — particularly Piḷḷai Lokāchārya's Mumukṣuppadi and Śrīvachana Bhūṣaṇam — catalogue the virodhi (obstacles) that stand between the jīva and its natural state of Bhagavad-kainkarya. Anyaśeṣatva is listed under svarūpa-virodhi — obstructions to the soul's own nature. It is 'against nature' in the most precise sense: not a moral failing in the first instance, but an ontological misorientation — the soul operating as if it belonged to itself or to something other than Bhagavān.
The cure for anyaśeṣatva, in Śrī Vaiṣṇava teaching, is tattva-jñāna — correct knowledge of the three realities (tattva-traya: cit, acit, and Īśvara) — combined with Āchārya-sambandha (connection to the Āchārya lineage) and prapatti. When the jīva truly recognizes its ananyārha-śeṣatva, the pull toward anyaśeṣatva loses its hold. The prapanna's life thereafter is the ongoing realization of this truth: every act of nityakarma (daily duty), every Prabandham recitation, every temple visit — all are redirections of the servant-nature back to its proper Master.