Ah, I think I know what Tewi's doing... she's taking a tissue and twisting one corner of it to make it thinner. Then she poked the pointed end into Reisen's nose. My cousin used to do this to me when I was younger, except he would poke it into my ear. It tickles like hell, and trust me, it's not fun.
Sniff SniffShe Pulls Pranks Too, but She's Really a Nice Girl
(イタズラもするけど本当は優しい子なんです)Koff KoffSnffsnrkkJab