Iwu are facial and body markings (scarifications) that were historically worn by Edo men and women. However, since the 1960s, the practice has been nearly extinct (Aisien 2011). In the past, Iwu were used as a way of proving that one was an Edo citizen, and the ceremony of having Iwu completed was an important rite of passage for men and women. The Osiwu, who also practised circumcision and other surgical procedures, would carry out the procedure of adding Iwu. There are different types of Iwu: ‘blades’ worn on the torso (Iwu-eko), and those worn on the face, such as Ikharo (three or four markings above the eyebrows), Irho (two narrow ‘blades’ worn on each cheek), Ovbihue (nasal ‘blades’), Ovbi-agbanmwen (chin ‘blade’), and Igho-okpa/Ukpgho (three forehead ‘blades’) (Aisien 2011, p. 22).

The number of Iwu also varied depending on the identity of the person wearing them. For example, royal men would wear six ‘blades’ on their torso, whilst men who were not royal would wear seven ‘blades’. Meanwhile, the Ọba’s female children would wear fifteen ‘blades’, and all other women would wear sixteen (Aisien 2011).

In the riverine area surrounding Benin City, there are two types of crocodile. The Ẹghughu, known in English as the dwarf or bush crocodile, is believed to be more docile ( ; Ọbazee 2025, p. 133). The second type is the Àgbákà, the aggressive Nile crocodile ( ; Ọbazee 2025, p. 11).

Crocodiles are one of the important animals represented in the historical Emwin Arhe, and they are known as Olokun’s guards or the “policemen” of the waters. The powerful and ferocious qualities of these animals might explain why warrior figures are often depicted wearing Uhunmwu-Ẹkuẹ (pendant masks) in the shape of crocodile heads on Ama-Ẹrọnmwọn (bronze relief plaques) ( ). Olokun devotees use crocodiles as sacrificial animals in offerings during the worship of Olokun.