Mina chan accident happens because the head doctor was outside the school stalking Mitsuba and Tsurugi (Tooru and Wu suspected someone of the Higashikata's stole the branch, probably Tsurugi was part of it because ''he could make his stand fly''). Mina tries to reach HD and gets calamited (people with bad karma can see WoU too, just like Rai's cellmates). Obviosuly, Mina's karma was less bad than the child killer and she is just midly injured.
When the mother in the park put the baby into the fountain instead into the pram, is because the mother touches Paper Moon origami and gives it back to Tsurugi, also Tsurugi says he was slowly losing control of his own stand.
When Ojiro walks towards Tsurugi and finds himself near the cliff, in the next panel there is a closeup on Paper Moon, Tsurugi used his stand to escape from Ojiro.
Regarding Tsurugi's speech in the flashforward (stand power, emotions boiling over that have to eventually reach their destination...) he is obviosuly referring to Speed King attacking Norisuke, just look at the words he uses, in fact soon after it's shown Norisuke in the body bag.
WoU first appearence (''naked'' with the armblades) has a design with many things reminding Tooru's clothes (the sun design and the strips around his body reminiscing the ones around Tooru's arms).
Then sure, Araki changed the flashforward, Joshu has both his arms, the family is chilling and the house is not destroyed by the plane, but there in 0 evidence on Tsurugi being the user of WoU