[At least Rin hasn't gone far before he hears that familiar call, and he immediately perks up - tail included! - and whirls around in the direction it's coming from!]
Oi! Yukio-- huuuh??
[He stops immediately, eyes going a little bit wide, jaw hanging open.]
What the...!
[Tail. There's a... Yukio has a...?! His eyes flick from that tail, to the slight point of ears, back to the tail. His own tail swishes behind him, curls at the tip as if to mirror the metaphorical question mark over top of his head, just as he lifts his finger to point.]
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Oi! Yukio-- huuuh??
[He stops immediately, eyes going a little bit wide, jaw hanging open.]
What the...!
[Tail. There's a... Yukio has a...?! His eyes flick from that tail, to the slight point of ears, back to the tail. His own tail swishes behind him, curls at the tip as if to mirror the metaphorical question mark over top of his head, just as he lifts his finger to point.]