Yamato was in the Sagittarius ward to mostly browse the weapons selection in the area. Although he normally used magical attacks, rather than physical, he still preferred to stock up on weaponry in case worse came to worse.

And who should he run into but - ah, the man, Ideo, he believed. Yamato hadn't spoken to him until he applied for the job at the labs - he understood he was on hold until the red tape was cleared, but the silence had been so long...

Well, it wasn't as if Yamato was doing much with his time.

So yes, have Yamato come walking down the street towards you, Ideo. He's hard to miss.