That is not necessarily the case. Hisao himself describes her with an odd fascination through his supercomputer comparison. And Lilly, who was able to make Hanako, who also has a bunch of problems, socialise with her, does not feel endeared by Rin's behaviour.Vertical wrote: speaking in comical ways and not taking things too seriously may be a way of endearing herself to aquaintances who have reservations about getting to know her better.
Part of the attraction with Rin is that we are not able to figure her out. Labeling her as random is another term for me that some people do not get her. And I like to believe that is intentional. All girls gain something from Hisao. Hanako needs another friend, Shizune wants some hottie to join her council, Lilly needs a husband to complete her as Yamato Nadeshiko, Emi has a training partner in the mornings but what does Rin gain from Hisao?
She does not strike me as the person to need new emotional bonds or confidantes. She ... seems content the way she is and I cannot help myself to wonder what kind of character development I may expect from her.