The two of them maintain a rather "ambiguous" relationship, neither willing to cross the line on their own.
So why is Herbert so adamant about figuring out Lukalia's thoughts this time?
There are two reasons for his actions.
On one hand, he's worried that this forced box-opening ability might interfere with his life, so he's guarding against her.
On the other hand, there's naturally a special purpose.
Their relationship is already developing through constant interaction, so seizing this opportunity to gain more leverage is a gain.
After thoroughly understanding Herbert's stance, Lukalia resignedly explained her actions.
"Alright, alright, I'll confess! Actually, there's no special purpose."
"You're interesting, with quite a unique destiny. I want to witness your [future], document your [present], and sing your [past]."
She looked at Herbert and said helplessly, "For this, I've paid a price and performed an ancient ritual, binding myself to you."
