Frank
Ah great, more undesired social interaction. That small pointy rock wasn't enough to actually cause damage to him and didn't even hurt that much, but his body was just so stressed out that week that it just caused a weird reaction in a situation where he wanted to be silent. 
The other mon's reaction to his sudden appearance was completely understandable, but his instincts got the best of him and he got into a fighting stance as a response. He locked his eyes onto that different looking weapon for a moment and thought of how weird it looked in comparison to his simple looking wooden staff. It also seemed to be able to cause a lot of damage...

Between his reaction and that observation, he ended up just staring in pure silence for a whole minute, not really knowing what to do next. Maybe he should try to explain what he was doing there? Or should he just say that he is sorry for the inconvenience, drop that fighting stance and leave? 
He opened his mouth as if he would say something... But then thought that both options would require from him the use of way too many words for his liking...

"..."

He just kept staring in silence.
Leonard
His eyes narrowed, and he started standing up- the other pauldron on the bank flowing up his arm, and the strange, *Entirely* Too bulky quarterstaff jumping like an item from Half-Life: Alyx into that free hand, while the other hand remained prime to fire at Azas.
"Well, *Peasant*?" He spat- there were flames coming out of his eyes, and they sparked intensely. "If you're here to rob me, I welcome the attempt. Otherwise, speak your business- you've already wasted a minute and 13 seconds, time I will not be able to reclaim."
Frank
Azas squinted his eyes for a moment after hearing the word peasant. He still didn't know what that word meant, but he had heard it more than one time in his life, mostly when he travelled through Neoni. He was almost certain that it was meant to be an offense, so it was more than obvious that the armarouge in front of him was getting angry. 
He should definitely say something now before he gets mistaken as a thief again:

"I no thief. Robbing is wrong" He said, finally assuming a neutral pose in front of them. "I find this place now, but occupied by you, so I leave. But I step this" He grabbed the pointy rock that caused all that trouble "And made noise. You startled."

That said, he patiently waited for a response, praying to the heavens that it would be enough to explain the whole situation and avoid the need for more words. He was also trying to avoid having to fight, since he was hungry and tired, but fighting would still be more pleasant to him than having any extended dialogues.
Leonard
His glare was scrutinous- clearly expecting a lie, and searching the Sawk's posture for one.
"Is that so...?" He hissed, slowly, dragging it out as if more time would give him the answer he was looking for.
His posture relaxed, ever so slightly, before he snapped back into stance.
"Then make good on your word: leave."
Kuro tossed his staff back onto the bank behind him, and after one last pointed glare finally lowered his "Blaster arm", though he did not divest himself of either pauldron, nor did his gaze leave the Sawk.