Ikan Aro are two linear markings in the centre of the forehead, located in between the eyes. These are usually inset with iron on depictions otherwise made of brass, bronze, ivory or wood.The use of iron was significant due the association of this metal with Ogun, who is god of iron and metal. These markings appear on both men and women, however are a common feature of representations of Iy'Oba Idia. Flora Kaplan (1993, 59) argued these are not tattoos, unlike the Ikharo. According to Nevadomsky (1986, 42), these incisions "signify determination, firmness, resolve, or even maturity". Kaplan (1993, 59) has also made a link between these markings and oral history told to her by Oba Erediauwa describing the events leading up to Idia (before she was Iy’Ọba) becoming the wife of Ọba Ozolua, whereby her parents tried to disfigure her to “repel” the Ọba. According to this history, the Ọba “sensing something was wrong”, called his doctors to intervene and treat her quickly, and as so she still became his wife.

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).