“Waifu” sounds like a nice term…

Three identical anime-style girls with long, wavy hair and yellow bows stand side-by-side against a plain white background. The central girl's expression and the text in her speech bubble change in a loop, cycling through "おっ" (Oh), "ドゥ" (Du), "デイン" (Dein), and "ドン" (Don), while the two side girls remain static with their "ぱー" (Paa) and "ドン" (Don) speech bubbles.