Thanks everyone, we are not big baseball fans but I might see if there are any cosplay events due to meet around the dome too.
We are very harajuku people, and a less toursity one sounds great.
I have been to harajuku like 4-5times, so new places are great for me.
We plan to use tokyo free kippu so we can go on any trains/地下鉄, its not worth the JR pass for our plans really.