"If that was the case, wouldn't I have been sent to Doru? After all before this he was traveling and not at Nyttiv."

Robert brought up a good point that counters Kiba's guess. Doru gave a different explanation, while eating his meal, taking a break in between bites to talk about how she could have gotten here.

"Well, actually humans in the digital world has appeared before you all. If two Digimon of sufficient power clash, they can rip open holes in space time. Around Mega level will cause that effect. Though not all of them have partners."

(Before you ask that has happened, just look at V-Tamers.)