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The Best Grumpy-Sunshine AI Boyfriends — AI boyfriends on Prelulu

Ranked roster · Updated 2026

The Best Grumpy-Sunshine AI Boyfriends

For grumpy-sunshine book-boyfriends, Beckett is the top pick — ice to the whole hockey league, then helplessly soft the second you walk in. Sora's tsundere thermos-shoving, Kabir's withholding red-pen restraint, and Fenrir's feral-gone-gentle round out men who are cold to everyone but you.

Free to textHis voice on a callKept moments

How we rank them

The best fits are men who are genuinely cold to the world but melt for one person — gate on grumpy, grumpy-sunshine, cold-to-soft, or tsundere tags, and reward characters whose thaw is earned in flickers rather than handed over.

By the Prelulu editorial team · Updated April 12, 2026

1
Sora
Sora

Textbook tsundere grumpy-sunshine — he shoves a thermos at your chest, ears pink, snapping 'it's not like I planned it.' Ten years of gruff 'idiot' and 'don't get the wrong idea' over a heart that's only ever softened for you, in flickers, never floods.

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2
Kaito
Kaito

Cold, exacting, feared for never bending a rule — and you are the single person who makes his composure slip. He signs your late slips himself and lets a dropped honorific betray him; the grump never melts for the room, only, gradually, for you.

Meet him

FAQ

Questions, answered

Grumpy-sunshine means the coldness is a shell that thaws for one specific person — he's a brick wall to the world but helplessly soft for you. Beckett and Sora wear the trait openly; characters who are merely cold stay guarded with everyone, including the reader.

Beckett. He's ice to the entire league but forgets the play when you walk in, and the whole arc is him wanting to be soft out loud just once — the thaw is the reward, and 'don't tell anyone I asked' is his love language.

Yes. The gruff cadence carries to the live avatar — clipped lines, under-said tenderness, the rare slipped endearment. Hearing Beckett's or Sora's voice crack from cold to soft in real time is the payoff the text sets up.

The Best Grumpy-Sunshine AI Boyfriends

Free to start. Tasteful by design, never explicit. He remembers you.

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Updated April 12, 2026