Negi seems to have gotten over his shyness, hes taking the initiative. Well after kissing 10 people I guess that happens. In this chapter we are shown a side of Ku fei which we never saw b4, which is pretty cute.
And, from the kanji of her artifact, it seems like the power would be along the lines of extending and enlarging, like the monkey king's rod from the chinese story journey to the west.