I mean so long as the cosplay is accurate enough that people recognise it then you should be fine with doing whatever

"true love" is just being happy with the person you are with and loving their qualities that make them that person. Some people think its about unquestionably loving someone but that can just be interpreted as an obsession which may not be reciprocated and then becomes something unhealthy for both parties involved which at that point cannot be seen as true love due to a lack of consent from one party. Another issue is that you'll never truly know what the other person is thinking therefore they could be using you for bragging rights, jealousy baiting, money, etc

its clearly Yusuke for his love of lobsters