This paper is aiming to investigate the impact of perceived autonomy and perceived risk on attitudes and opinion about two assistive robots (Paro© and Asimo©), as factors explaining the probability to become "friend" with a robot. In a large online survey conducted in France, 2 783 participants were asked to complete three questionnaires: (1) The DOSPERT scale (for Domain-Specific Risk-Taking; Blais & Weber, 2006) to assess risk attitude and perception of risks; (2) The revised version of the FQUA-R scale (for Friendship Quality-Revised; Thien, Razak & Jamil, 2012) to assess close relationships and potential friendship with a robot; (3) The PAS (for Perception of Autonomy Scale; Lombard & Dinet, 2015) to assess positive and negative attitudes towards autonomy of robots. Structural equation modelling was used to determine the relationships between all the variables for two robots (ASIMO© and PARO©).