Answer

Wa ʿalaykum al-salām wa raḥmatullāh wa barakātuh.

Short Answer

No — you are not a kāfir or mushrik. Using an anime character's picture, even one nicknamed "god of genjutsu," does not constitute kufr or shirk as long as you did not believe that character to be a god, did not worship it, and did not intend to insult or rival Allah. The title "god of genjutsu" is a fictional in-universe label from the anime; it is not a claim of divinity, and you explicitly state you never considered him a god. Since you were ignorant (jāhil) at the time and have since repented in your heart, you remain a Muslim. You are not accountable for what you cannot access or delete.

Detailed Explanation

1. The Principle: Kufr Requires Belief or Intent, Not Mere Appearance

In the Hanafi school, a statement or act does not expel a person from Islam unless it involves deliberate denial (takdhīb), mockery (istihzāʾ), or belief (iʿtiqād) that contradicts a definitive tenet of faith. Ibn ʿĀbidīn (Radd al-Muḥtār, 4/220–224, Bāb al-Murtadd) and the author of al-Hidāyah (Kitāb al-Siyar) both stress that the criterion is the qasd (intent) and iʿtiqād (belief) of the speaker/actor, not the literal wording or image alone.

The Qur'an says:

"Whoever disbelieves in Allah after his belief — except one who is forced while his heart is firm in faith — but whoever opens his breast to disbelief, upon them is the wrath of Allah." (al-Naḥl 16:106)

This verse explicitly excludes the one whose heart remains firm in īmān. You state your heart never accepted the character as god — so the verse's exception applies to you.

2. The "God of Genjutsu" Title Is Fictional, Not a Divine Claim

Calling a fictional character "god of genjutsu" is like calling someone "king of chess" or "master of the game." It is a figurative title within a story, not a theological claim. The Hanafi jurists distinguish between lafẓ al-kufr (words of disbelief) and lafẓ mubāḥ (permissible figurative speech). Imām al-Ṭaḥāwī in his ʿAqīdah and the commentators of Sharḥ Maʿānī al-Āthār emphasize that titles and metaphors are judged by their ʿurf (customary usage) and intent.

3. Ignorance (Jahl) Is an Excuse in Matters of This Nature

The Prophet ﷺ said:

"Allah has pardoned my Ummah for mistakes, forgetfulness, and what they were forced to do." (Sunan Ibn Mājah, no. 2043; declared ḥasan by scholars)

Imām al-Shāshī in Uṣūl al-Shāshī (p. 333) and Ibn ʿĀbidīn (Radd al-Muḥtār, 4/224) note that a person who commits an act of apparent kufr out of genuine ignorance (jahl ghayr muqārin li-l-taqlīd) is not declared kāfir; he is taught and corrected. Since you were ignorant and did not intend shirk, you are excused.

4. You Are Not Accountable for What You Cannot Access

Islamic law does not obligate a person to do what is beyond his capacity:

"Allah does not burden a soul beyond its capacity." (al-Baqarah 2:286)

Since you cannot access the old account, you are not sinful for the picture remaining there. However, you should:

• Sincerely repent (tawbah) for having used the image and for any posts that may have contained impermissible content (magic-themed imagery, etc.). Tawbah wipes out the sin.
• Make a reasonable effort to recover or delete the account (e.g., password recovery, reporting the account to Facebook for deletion). If you genuinely cannot, you are excused.
• Avoid such content going forward, and be careful with what you post.
• Do not obsess over whether you were kāfir — this is a waswasa (whisper) from Shayṭān. The Prophet ﷺ warned against waswasa in ʿaqīdah (Ṣaḥīḥ Muslim, no. 132).

5. On the Anime's Magic/Chakra Themes

Watching or referencing fictional magic in anime is not kufr in itself, provided you do not believe in it as real or practice it. However, scholars like Muftī Taqī ʿUthmānī (in Islām aur Jadīd Maʿīshat, and various fatāwā) and Ashraf ʿAlī Thānwī (in Bahishtī Zewar, Part 1, on the harms of futile entertainment) advise Muslims to avoid content that normalizes magic, shirk, or immorality — not because it makes one kāfir, but because it corrupts the heart and invites waswasa. So the advice is: avoid it going forward, but do not fear that you have left Islam.

Conclusion

You are still a Muslim. You did not commit kufr or shirk because:

1. You never believed the character to be god.
2. You were ignorant.
3. You cannot access the account, so you are not obligated to remove the picture.
4. Sincere tawbah suffices.

Make tawbah, try to delete the account if possible, avoid such content in future, and ignore the waswasa. May Allah forgive you and keep you firm upon īmān.