I'm not sure about the "han", but I'm pretty sure the "hi hi hi" is supposed to be the way he laughs.
Judging by some strange word choice throughout Adventure, I suspect that a non-native English speaker is writing at least a portion of the dialogue, which would explain minor errors here and there.
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The devs might want to consider not having Daily Missions add temporary XP to the XP bar.
I feel like seeing XP being added to your bar after completing a mission, only to see the progress disappear a moment later is especially demoralizing. It looks like it's just being stolen away...