Sukuna is “into” Megumi mainly because Megumi’s technique and body are perfect tools for Sukuna’s long‑term power‑up and possible rebirth, not because he likes him in a friendly way.

Canon reason: Ten Shadows technique

In the story, Sukuna becomes interested in Megumi once he sees the Ten Shadows Technique in action, especially Megumi’s shikigami summons.

  • Megumi’s Ten Shadows is a rare Zen’in clan technique that can potentially rival Gojo’s Limitless and Six Eyes, making its user an incredibly valuable asset or vessel.
  • An ancient sorcerer with Ten Shadows once fought a Six Eyes + Limitless user to a mutual death, which implies that in the right hands, Ten Shadows can reach absurd, Gojo‑level heights.

Because of this, Sukuna sees Megumi less as a “student” or “kid” and more as a high‑grade weapon he can steal.

Sukuna’s plan for Megumi

Over time, it becomes clear Sukuna is not just curious; he is actively planning around Megumi.

  • Sukuna repeatedly spares Megumi’s life, heals him, and even tells him not to die because he has “something” he wants Megumi to do, which hints at a specific plan rather than random mercy.
  • The popular and later‑supported interpretation is that Sukuna wants to take over Megumi’s body, wipe out his shikigami, then fuse with the final one (like Mahoraga) to resurrect or evolve into a new, even more powerful form.

So “why does Sukuna like Megumi?” → because Megumi is the key piece in a resurrection / power‑up strategy.

Personality and “interest” angle

There is also a character‑driven layer to Sukuna’s interest.

  • Sukuna is intrigued by Megumi’s mindset: Megumi is talented but often holds back and is willing to sacrifice himself, which frustrates and amuses Sukuna, who wants to see Megumi abandon restraint and use his full potential.
  • During key arcs, Sukuna directly questions why Megumi runs away or fights half‑heartedly, suggesting he enjoys pushing Megumi toward a darker, more ruthless way of using his shadows.

In other words, Sukuna likes watching Megumi grow into a sorcerer whose technique will be even more valuable once he steals it.

How fans and forums talk about it

Recent discussions and analyses online usually frame this as a mix of in‑universe strategy and character obsession.

  • Many fans describe Sukuna as “obsessed” with Megumi because, compared to others, Sukuna shows unusual patience and focus when it comes to Megumi’s growth and survival.
  • Theory videos and articles from 2020–2024 often argued (and were later vindicated) that Sukuna was grooming Megumi as his ideal vessel for a full return, not simply being nice or having a soft spot.

So in fandom terms, the trending answer to “why does Sukuna like Megumi?” is:

Because Megumi’s Ten Shadows body is the perfect vessel and power‑up route, and Sukuna enjoys molding that potential until he can hijack it.

TL;DR: Sukuna likes Megumi because Megumi’s Ten Shadows technique and lineage make him the perfect vessel and power‑up tool, and Sukuna is fascinated by pushing that potential to its limit before taking it for himself.

Information gathered from public forums or data available on the internet and portrayed here.