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Aerial reconfigurable intelligent surface (ARIS), is an intelligent reflecting surface (IRS) mounted by unmanned aerial vehicle (UAV), represent a promising candidate for assisting device to device (D2D) millimeter wave (mmWave) communication in temporal and urgent situations, e.g., open-air events. IRS can efficiently mitigate the high blockage impact on mmWave propagation signal in base station to device use case. But, the scenario of D2D communication is different as both the transmitter (TX) to ARIS and the ARIS to receiver (RX) links are highly susceptible to be blocked due to the low height of the TX and RX. Consequently, in this paper, the impact of human bodies blockage on ARIS aided D2D mmWave communication is studied. Firstly, we assure the effectiveness of using ARIS in this network to significantly enhance its performance, then, the effect of ARIS height on the blockage occurrence and system performance is investigated to find out the optimum height. Our results proves that ARIS highly mitigates the blockage, reduces it by 85%, comparable to the case without it. Moreover, a high increase in system spectral efficiency, 1.2 bps/Hz, can be guaranteed, if ARIS is configured at optimum height.