Tbh. I wanted a reaction series like this to exist for a while. By chance would you mind making a version that involves the Undertale multiverse?, Tensura and Undertale have very interesting things in common (Also. if chara wants to be with frisk so badly, she could just share frisk with sans or let frisk decide or something)
Undertale technically has both a cannon multiverse and a non cannon multiverse. The cannon multiverse in this case is delta rune being a different universe from Undertale that is either a different timeline or an alternate universe (regardless. Most evidence points towards gaster being it's creator). The non cannon multiverse is stuff like glitchtale and other fan made universe's with the addition of character's such as ink sans and error sans who are a creator and a destroyer respectively (this is the type of Undertale multiverse I meant. And while it will not explain everything. If you watch xtale it will help explain some of it, however it is still worth finding videos and stuff so you can understand the characters better) I'm also not giving you a time limit or anything, if you decide to do this request in a month or two then it's your choice