Unfortunately in panel 3 those aren't Eila's tights Perrine's sniffing but Mio's jacket.
Eila ♥Perrine...Strike Witches 4koma "In Eila's head..."What!? You're supposed to be Sanya?Hmm, okay... SanyaSanyaSanyaSanyaSanyaSanyaSanyaT-the Squadron Leader's smell...♥*gulp* S-squadron Leader Sakamoto's pants... This is the best!No way that'll work.Sanya would never do anything like that...Now Eila... Act as if I am Sanya and protect me!Hehehe, don't underestimate my foresight ability.Wha-! What was that ridiculous imagination right now!?