Although ironically 11 is probably the least likely to get Rose-kissed because he would know better than to do the "NO ROSE STAY IN YOUR UNIVERSE" probably
Could meet the original universe Ashildr and give her herself and be like "knock yourself out. The one companion you know you'll have through the same kinds of things "
💀Go, Cubs Go💀
: PROBABLY OKAY since 1) 10.5 & Rose are inseparable (he has to teach her to pilot the TARDIS) 2) Rose would probably save Ashildr, just take her traveling ala 8!yo Amy instead of getting lost for several years => creating the Melody Pond + River Song loop
3) Ashildr/Rose wouldn't want to strangle each other back in the day, Rose would just be trying to convince her "No it's not your fault people die. PEOPLE DIE BUT IT IS NOT YOUR FAULT."
But yes. I'm now 10000% convinced 10 is going to turn into 10.5 and immortality patch himself and take the AU Ashildr on adventures and try to teach her "No, people die. It's not your fault. You can't save the universe, it's okay to just save some." like Donna taught him
funny thing is they do imply Eight has seen some action in the books but he still manages to retain that whole "I'm innocent and don't know what any of that is about" aspect
also I have a question for you go loook