The Lord has unlimited forms and bodily features (advaitam acyutam anādim ananta-rūpam). These are all situated in Vaikuṇṭha, yet Lakṣmīdevī, the goddess of fortune, being inspired by līlā-śakti, could not appreciate this unprecedented form of the Lord. In this regard, Śrīla Madhvācārya recites the following verses from the Brahmāṇḍa Purāṇa:

adṛṣṭāśruta-pūrvatvād
 anyaiḥ sādhāraṇair janaiḥ
nṛsiṁhaṁ śaṅkiteva śrīr
 loka-mohāyano yayau

prahrāde caiva vātsalya-
 darśanāya harer api
jñātvā manas tathā brahmā
 prahrādaṁ preṣayat tadā

ekatraikasya vātsalyaṁ
 viśeṣād darśayed dhariḥ
avarasyāpi mohāya
 krameṇaivāpi vatsalaḥ

In other words, for the common men the form of the Lord as Nṛsiṁhadeva is certainly unseen and wonderful, but for a devotee like Prahlāda Mahārāja such a fearsome form of the Lord is not at all extraordinary. By the grace of the Lord, a devotee can very easily understand how the Lord can appear in any form He likes. Therefore the devotee is never afraid of such a form. Because of special favor bestowed upon Prahlāda Mahārāja, he remained silent and unafraid, even though all the demigods, including even Lakṣmīdevī, were afraid of Lord Nṛsiṁhadeva. Nārāyaṇa-parāḥ sarve na kutaścana bibhyati (Bhāg. 6.17.28). Not only is a pure devotee of Nārāyaṇa like Prahlāda Mahārāja unafraid of any dangerous condition of material life, but also if the Lord appears in order to mitigate the fear of a devotee, the devotee maintains his status of fearlessness in all circumstances.