He may have survived the battle but he's dead on the inside.

Artist commentary from the corresponding Nicoseiga Manga page:

2.白魔導師シロップさんの野望
1話目たくさんのコメントお気に入りありがとうございます！ 別のお仕事も入れようと思ってるのでシロップさんは週一ペースの更新になると思います。 いずれニコニコらしく、コメントにお返事とかできたらと考えています。

2. The Ambition of White Mage Syrup
Thank you for the many comments and faves for Chapter 1! I think I'll be working on something else too, so I guess I'll be updating Syrup's series on a week-by-week basis. One of these days I hope I can give smiling Niconico-like replies to the comments.

"Niconico" is onomatopoeia for smiling. It can also refer to the act or of smiling (or the attributes thereof). The words "niconico-like"/"in a smiling fashion" are therefore used as part of a catchphrase greeting of sorts on NicoNico.