I don't remember exactly which interview, I think it was one he did for dox promo.
edit I remeber now!! It was around the time Hickman was doing interviews post hoxpox and he either said it on twitter or in another interview but here (https://aiptcomics.com/2019/05/20/x-...-cool-cyclops/) he explains his love for Emma.
Also small side note I'm the one who asked him about why his top 5 mutants are his favourite