Attendant of Vasudeva and a bhāgavata
Vidura describes Uddhava as 'vAsudevAnucharaM prashAntaM bR^ihaspateH prAktanaM pratItam' (SB 3.1.25); verse 24 calls him 'bhAgavataH'.
Human
Uddhava
उद्धव
Also known as औपगवि · Aupagavi
Uddhava, of the Vrishni line, is Krishna's cousin, counsellor and intimate friend, traditionally a pupil of Brihaspati. At SB 1.8.7 he accompanies Krishna with Shaineya (Satyaki) at the departure from Hastinapura. The great discourse of the eleventh Skandha, the Uddhava-gita, is spoken by Krishna to him — the last major teaching section of the Bhagavata.
Śrīmad Bhāgavata Mahāpurāṇa 1.8.7 — Sanskrit Wikisource (pinned oldid=196197)
Called Tīrthakīrti in this episode
The closing verse addresses him as friend and as Tirthakirti: 'vArtAM sakhe kIrtaya tIrthakIrteH' (SB 3.1.45).
Uddhava — accompanied — Krishna
Uddhava departs together with Krishna: 'shaineya-uddhava-samyutah' (SB 1.8.7). Evidence: EXPLICIT.
Absorption and silence when questioned by Vidura
Asked by Vidura for news of Krishna, Uddhava could not answer and fell silent for a moment; immersed by the nectar of Krishna's feet through intense bhakti-yoga, all his limbs bristled and he wept (SB 3.2.1-5).
Seeing the Lord alone on the bank of the Sarasvati
Searching for his beloved lord, Uddhava saw Him seated alone on the Sarasvati — dark yet radiant, free of rajas, eyes calm and tinged red, four-armed, in yellow Kaushamba, His right lotus foot on His left thigh, leaning against a young ashvattha (SB 3.4.6-8).
Worshipping Hari in samadhi at the Badari hermitage
Instructed by the guru of the three worlds, the source of sound, Uddhava reached the Badari hermitage and worshipped Hari in samadhi: 'badaryAshramam AsAdya harim Ije samAdhinA' (SB 3.4.32).