"Hmm hmm!" 2569 walked to Du Xixi's side, circled around her, and its electronic screen showed an expression of being on the verge of tears, "2569 has been saving up for so long!"
2569 indeed has a "childish" personality. When it can work, it's definitely among the top household robots, but most of the time, it can't work and needs everyone to coax it like a child.
Du Xixi treats it like a child—occasionally coaxing it to do some physical work—so 2569 behaves quite childishly in front of Du Xixi, secretly taking the little snacks Du Xixi makes to expand its private stash.
Of course, 2569's ability to hide its stash isn't very good; Du Xixi and the others have known about it for a long time but just don't mention it. Sometimes, they even secretly help it "expand the stash" like teasing a child.
