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Ken will join the team in Persona 3 Portable late in your journey, but is one of the strongest members you can recruit. If you play as the female protagonist you can start a social link with him, and despite being 11 years old, he is also a romance option.

Here is everything you need to know about the Justice social link.

You will have to be level 59 before you can craft Melchizedek. You also have to max out the Justice Arcana social link by talking to Ken in the dorm at night. However, it will automatically gain 10 levels thanks to your maxed-out social link.

Melchizedek is only weak to Dark-type one-hit KO moves, but this weakness can be negated with the right accessory or enough Homunculi in your inventory. It also learns how to repel these attacks at higher levels. It deals strong physical damage to enemies and also learns healing and support moves.

Here are the moves it learns:

  • Start - Vicious Strike
  • Start - Mediarahan
  • Start - Auto-Mataru
  • Level 60 - Weapons Master
  • Level 64 - Akasha Arts
  • Level 65 - Repel Dark
  • Level 69 - God’s Hand

Only the female protagonist can start the social link with Ken, and it is possible to romance him. The Justice Arcana social link is one of the late game social links, and can only be started after September 1.

Speak to Ken in the dorm at night to start this social link.

Speak to Ken in the dorm at night to start this social link.

To start the link you will need to speak to Ken in the dorm at night. You must have Max rank Courage in order to ask him out. He is available in the dorm some Tuesdays, and every Thursday at night, where you can take him out to dinner.

It is advised that you bring a Justice persona with you to max out this social link; otherwise, you will have to hang out with Ken more than 10 times in order to max out the link. Despite being a late-game link, he can take some time to max out.

Ken can call you on your days off, and can hang out with you as you walk Koromaru. Agreeing on a day off will increase his affection but will not result in a rank-up. Walking Koromaru with him will award you three affection points for both characters. There is also a chance to meet another character while out.

Despite being a late-game link, Ken can take some time to max out.

Despite being a late-game link, Ken can take some time to max out.

If you do not see a dialogue choice listed, then what you choose doesn’t make a difference to progression. If you do not choose the romance dialogue, you will enter the friendship route, which gives the same amount of affection, even though there are fewer options. The correct dialogue options are:

  • Rank 1 - Choose any.
  • Rank 2 - You shouldn’t be a picky eater.
    • I like action shows, too.
  • Rank 3 - Want to come earlier next time?
    • Honey?
    • I just can’t stop reading them.
  • Rank 4 - You’ll grow out not up.
    • Nope, not at all.
  • Rank 5 - Actually, I want to hear more.
    • I’ll buy you a different series.
    • You’re okay the way you are.
    • That’s not true.
  • Rank 6 - That’s just how I am.
  • Rank 7 - Unfortunately, I don’t have one. *Romance option. Other options lead to the friendship route.
    • He’s right in front of me.
    • Not at all.
  • Rank 8 - It’s because I like you. *Romance option. Other options lead to the friendship route.
    • I’m not lying.
    • Wanna hold hands?
  • Rank 9 - Friendship Route
    • There’s no rush.
  • Rank 9 - Romance Route
    • I didn’t mind at all.
    • You’re fine the way you are.
    • Don’t worry, I’ll wait for you.
  • Rank 10 - Choose any.