pron. he (third person singular, masculine or gender-neutral)

Ahrk fin zul, rok drey kod, nau tol morokei frod, rul lot Taazokaan motaad voth kein!
And the Voice, he did wield, on that glorious field, when great Tamriel shuddered with war!
(Book, Songs of Skyrim)

Rok funta koraav.
He failed to see.
(Paarthurnax, 0009C218)

Het nok Faal Vahlok, wo kron pogaas moro. Fah ok unslaad mid, rok aav dilon voth lot zin.
Here lies the Guardian, who won much glory. For his eternal loyalty, he joins the dead with great honor. Become Ethereal
(Word Wall for Mid, Battle Fury)

Pronunciation of /rɑk/ is atypical and should be avoided. May be a gender-neutral pronoun given that dragons are non-gendered, refer to themselves with rok, and as far as is known do not recognize the pronoun rek.