THE FUTURE mod already has a default for Steven's dialogue with modded characters, but I recently brainstormed some ideas for possible things Steven could say to the Reverie characters:

[Satori]
why are you looking at me like that?
oh, sorry i was talking to that eye next to you
wait, thats your third eye?
and you can read *minds*!?
...please dont tell my wife

[Eika]
thats some pretty sick stacking skills there
who taught you? ...oh, youre dead
must be pretty boring in the afterlife imo
stacking rocks like that
no offense, of course
my friends would love to see it

[Seija]
ʍǝu sᴉ sᴉɥʇ ʞo
sᴉɥʇ ǝʞᴉl ʞlɐʇ ǝɯ ǝʞɐɯ oʇ pǝsn noʎ oopooʌ ʇɐɥʍ ʍouʞ ʇ,uop I
ǝɹnʇnɟ ǝɥʇ oʇ puǝʇxǝ ʇusǝop ʇᴉ ǝdoɥ ʎluo uɐɔ ᴉ ʇnq
¿ʎɐʞo 'ʎpɐɥs ooʇ ƃuᴉɥʇʎuɐ op ʇuop ʇsnɾ

[Hourai]
oh, another creepy doll, huh?
your blank, dead stare wont fool me
though he might have some playmates for you
come take a look

[Tainted Satori]
how do you even work that wheelchair?
most racers i know would kill for those swerves
i almost want to maim myself so I can mimic you
...if i had any limbs, that is

[Tainted Eika]
christ, what happened to you?
i keep forgetting how much blood humans have
especially when they die
though i shouldnt be surprised
given the things i see in these depths
you'll fit right in

[Tainted Seija]
uᴉɐƃɐ ʇᴉɥs sᴉɥʇ 'ɥo
ʇᴉɹdlnɔ ʇɐɥʇ ǝʞᴉl ʞool noʎ
¿ɹǝɥ uo ǝʎǝ uɐ dǝǝʞ noʎ plnoɔ 'ʇou ǝɹnoʎ ɟᴉ
ʇuǝɯᴉpǝdɯᴉ ɥɔǝǝds sᴉɥʇ ɟo ʞɔᴉs lɐǝɹ ƃuᴉʇʇǝƃ ɯᴉ

[Tainted Hourai]
ive seen stacking dolls before
but this is a whole new level
who carved that half of your face?
assuming you didnt kill them, of course
you have that kind of look on you
maybe seeing into the future can help?