Iscan and Professor Laventon are giving me some headache! I tried to sumarize some similarities and differences between the new characters and their potential or confirmed descendants (using their official artworks). We can use what they can have in common to guess (if any) some potential descendants.
Kamado and Rowan
- Similarities: shape of eyes, eyebrows, nose, moustache, sideburns, mouth and head; color of skin and eyes; gender; name origins.
- Differences: hairstyle; color of hair and facial hair; age.
Cylenne and Cyrus
- Similarities: shape of eyes, iris, nose and head; color of skin, hair and eyes; lack of eyebrown and facial hair; name origins; age.
- Differences: hairstyle; shape of iris and mouth; gender.
Mai and Marley
- Similarities: shape of eyes, mouth, nose and head; color of skin, hair and eyes; hairstyle; name origins; gender; age; use of hair ornament.
- Differences: type of ornament.
Lian and Clay
- Similarities: shape of eyes, mouth, nose, sideburns; color of skin, hair and eyes; hairstyle; gender; name origins; hat features.
- Differences: shape of head (chin; skin); eyelashes; age.
Arezu and Mars
- Similarities: shape of eyes, mouth, nose, head; color of skin, hair and eyes; hairstyle; gender; name origins; age. Maybe eyebrows.
- Differences: show eyebrow.
We have, in general:
- Similarities in potential: shape of eyes, nose, eyebrow, moustache and sideburns; color of eyes, hair and skin; hairstyle; name origins.
- Minor differences: Color of hair and hairstyle; shape of some head features (chin and mouth). Color of hair just change when age change. Hair color and hairstyle don’t change at same time.
- Major differences: gender; age; distinctive ornaments can be present, but aren’t exact the same. The possible differences occur, but not all in same character. Gender and age don’t change at same time.
Now, comparing with the NPC of the regions.
Iscan
- Shape of eyes (almost closed): Morty.
- Shape of nose (round): none similar.
- Shape of eyebrow (rounded, divided in two at one of sides): none similar.
- Shape of mouth: Acerola; Raihan.
- Moustache and sideburns (none): not distinctive.
- Hairstyle (shaved or bald with blue wave pattern): Mr. Fuji (bald), Blaine (bald/shaved); Crasher Wake (bald with little hair); any Sage trainer class; Spenser (bald with blue patterns in body).
- Color of eyes (black): not distinctive.
- Color of hair/eyebrow (deep blue): Falkner; Cress; Marlon; Mable; Lana; Nessa; Battle Chatelaine Evelyn; Phyco and Soliera (nonsense).
- Color of skin (brown): Brock; Matt, Phoebe; Shelly and Archie (ORAS); Spenser; Dahlia; Lenora; Iris; Marshal; Marlon (if Iscan is white-tanned); Grant; Olympia Professor Kukui; Professor Burnet (if Iscan is white-tanned); Hau; Hala; Kiawe; Olivia; Professor Samson; Hop; Leon; Rose; Nessa; Bea; Raihan; Peony. Doesn't seem to be a good single criteria.
- Name origins (Iscan/Susuki from Miscanthus sinensis, the chinese silvergrass): none. Marlon has a name based on a similar watergrass.
Conclusion: if Iscan have descendants in the present of the majority of Pokémon games, it's more probable that we haven't see they for now. Maybe a hook for a future reference. If I would guess anyone, I'd say Spenser, Raihan or Marlon, that match in just two of the ten criteria.
Professor Laventon
- Shape of eyes (tiny iris, pentagonal white shape): none.
- Shape of nose (a line): not distinctive.
- Shape of eyebrow (thick lines): not distinctive.
- Shape of head: not distinctive.
- Moustache and sideburns (very little beard and facial hair): Professor Elm; Alder.
- Hairstyle (not show): not distinctive.
- Color of eyes (light purple): Bugsy; Janine; Winona; Lucian; Alder (I'm surprised actually); Olympia; Kahili; Allister; Bede.
- Color of hair/eyebrow/facial hair (black): not distinctive.
- Color of skin (brown): similar to Iscan. Doesn't seem to be a good single criteria.
- Name origins (lavender): none.
Conclusion: like Iscan, if Professor Laventon have descendants in the "present-time", we haven't see them for now. Maybe a future reference. If we ever see it without it's wooly hat, I guess it could get more information (could it hide an Alder-like hairstyle?).
Feel free to complement, if I forgot anything.