Agni
Rudra and Agni have a close relationship. The identification between Agni and Rudra in the Vedic literature was an important factor in the process of Rudra's gradual development into the later character as Rudra-Shiva. The identification of Agni with Rudra is explicitly noted in the Nirukta, an important early text on etymology, which says "Agni is called Rudra also". The interconnections between the two deities are complex, and according to Stella Kramrisch: "The fire myth of Rudra-Siva plays on the whole gamut of fire, valuing all its potentialities and phases, from conflagration to illumination." In the Shatarudria, some epithets of Rudra such as Sasipañjara ("of golden red hue as of flame") and Tivasimati ("Flaming bright") suggest a fusing of the two deities. Agni is said to be a bull and Lord Shiva possesses a bull as his vehicle, Nandi. The horns of Agni, who is sometimes characterized as a bull, are mentioned. In medieval sculpture both Agni and the form of Shiva known as Bhairava have flaming hair as a special feature.