What does it mean?(Ni)

[Gar]

A speechless Zeltron was a rare sight indeed, although Gadeon had a knack for invoking this state in Ni on multiple occasions, including now. A doubtful expression shadowed her face as she processed his words and struggled for a response. After a moment of pensive silence she finally recovered and replied softly, "I don't understand, Gaddy...you mean an experience that no other Zeltron has experienced? Because its really hard to find something like that..."