People You can talk if i'm wrong, but i tell for you what i thought about the finale.
I after reading the manga as everybody else think The mangaka don't tell anyone with who Negi gets, but after a bit of thinking i found out something. Ken akamatsy tells at the manga that Cho is Negi's descendent, that's means he finishe with someone obviously. When the mangaka've been commenting about each students's life fineshed he show as Asuna as ayaka wearing withe dress with Negi and Fate. Later i deduce myself they could be a double couple but don't know which would of who, but Negi couldn't get wit Asuna because he talks her who he liked and for her expression isn't she. It does remain Ayaka, so i looked for something to prove my ideas, when at the chapter 355 describe what happens to Ayaka it show that she get pleased and so much happy just stay by his side, but at the chapter 353 when asuna is looking at the time box Ayaka has a grand-grand-grand-granddaugther, in orther words, How she got the parent if she If she ever was at his side(negi), that's means negi might married with Ayaka. only can be two people ayaka or asuna.