Lagss is a character that not a lot of people know about but her skills are the real deal. She was able to take on Ultra Instinct Goku and that’s not something that Yoshino could pull off. That’s why Yoshino will ultimately have to take the loss here as she is just outgunned and outmatched. A single good shot could theoretically destroy her. Lagss wins.
Suggested by Joemama Sans is back but he won’t fare any better against Yoshino. While she may look like a nice kid, she has abilities that would destroy Sans in an instant. Her ice abilities are completely lethal and she can create a blizzard with incredible range. Sans won’t be able to dodge the attacks in time and instead will be crushed right away. Yoshino rarely gets serious in a fight so his best chance would be to overwhelm her from the start but the issue is that her defense is just as good if not better than her attack power. Yoshino Himekawa wins.