Sukui said
No one can hear them, but their actions look obvious to him.
I'm sorry, but I heavily disagree with you there. Please listen to what I have to say without being offended (I'm saying this as kindly as i could word it)
The two are currently just talking, not carrying weapons or anything like that. Their action is
talking, and there is nothing actually suspicious in the gardens. This event is part of something HylianRose and I (along with Nero) confirmed (harmless bantering moment among Bael and Lith), so not even someone like Teroyrax (who can actually sense negative emotions via his necklace) can think that they're doing something drastic.
I'm not trying to be offensive here, but I'm just saying that Isse's sudden reacttion is very out-of-place, considering how he's not close enough to hear what they're saying.