teiich
Manga: on manga teiich looks much more mature, serious and selfconfident about they feelings on yuuko, the 2 times they have big bad relations problems was him who solved then, first on amnesia arc: the problem on manga was different than anime on manga yuuko see her start to become a burden to teiich because he schools grades starting to fall and he have some sleep problems try to give all the attention who yuuko demands this make her starting to feeling pissed and ended make her want forget about him to give him more free time, but after her loose her memories he started to desesperated run for her and make her regain her memories and in the end he confess first he loves her and both ended kissing
again in curse arc, because of the kiries jeaouls about yuuko and teiich relation, yuuko get again feelings like a burden for him(because she never can really stay with him and is trapped on the school)and on this time not forget but tried to avoid him to give again he free live, but again teiich was runing to her show how him serious about he love and in the end hey says he never gona let her leave him side and want know everthing about her and again they kissed.
note: he have on 12 years old.
anime: in anime teiich is much more childsh, and still loves her but is much more embarrassed to admit he feelings for her to the others ppls, in the amnesia arc after the accident and see her forget about him, he tried to avoid her and only try to go after her only with the help of kirie(who was have a big change on her role on this arc) and they not have a kiss in end.
Yuuko
manga:well on manga she just get some more fanservices, and her fear about the past start to diminish through the course of the history showing she starting to accept remember her past, her personality on manga is almost the same of anime, the only differ is on amnesia arc when she is alone she unconsciously calls for teiich and in the end get all her memories with him back not only her feelings for him, and after that was back to normal and not start to act more child, jealous, ashamed
anime
n anime almost of the time is same of manga the change is her fear of her memories still to high and she try to avoid get her past back all times(run from shadow yuuko).
shadow yuuko: for me this character hold the most important role in the story and get hugh neglected on anime make him looks like the story villian
manga
n manga she don't looks so to evil like in anime, in fact she almost of the time just "walking around" the school and talk with the protagonists, she is much more like:
yuuko: hey shadow that mine past is too pain for me to hold, u can hold for me until i think prepared to hold him?
shadow yuuko: ok i can hold it for you.
she dont haunt kirie that much who happens on anime, for i remember she just go to kirie 2 or 3 times until last chapter, she gone for teiich and yuuko others times too, and she appear much more times on the start teiich, kirie and yuuko thinks she is evil, but after sometime they start to realize this not all the truth(kirie first), on amnesia chapter she even helped teiich run to make yuuko get her feelings and memories back, when after him tried to talk with yuuko and her ignore him after her lost her memories, shadow yuuko appear for teiich saying that "yuuko really loved teiich", this gives to teiich he first courage to go for her
anime:her role is big reduced to something near a demi villian, because she aways saying jealous about teiich like want to harm him(on wikipedia episode recap is implicity when yuuko push teiich was the shadow yuuko possessed her to do this, and in manga she does this in a moment where she was nervous about the burden)and on anime she haunted too much kirie(almost of the times kirie's get alone she appear for her and try to scary her) until now without any explanation about "why"(in manga she go for kirie much less and is more implicated this is because her grandmother role in yuuko's death).
kirie: manga and animes diverges big on her role
manga: she is a freaking bitch(at last for me), because she not "wonder" yuuko likes in anime is much more implicated she is jealous about how wonderfull yuuko is, because yuuko have anything she wants: perfect body, big bobs, long hair, a smiling beautful face, a shining personality and a awesome guy, and kirie not, is body less, no bobs, short hair tsundere face and personality, making her feelings for teiich are much more small than her jealous about yuuko, everytime she get alone with teiich she try to show to him "how she looks like yuuko in face" and dont try to wins him by what she have, and another big negative side of her is when she is near yuuko and teiich not present, she become a really bitch aways yelling at her to leave teiich(this is the reason for yuuko leave teiich the second time in the curse arc), saying "because she's a ghost they never can be happy, saying yuuko is a burden to him, blame her(this is what i really hate on her), she was good only 1 time on the amnesia arc where only in the end she shone(after she tried to make teiich forget yuuko and teiich showed no intention to lost yuuko she help him to make yuuko remember, was she who pushed teiich to yuuko not the "magic stumbling" of teiich)and after that she get back to her bitch role.
anime: she starting like a bitch but looks like in the end she really looks like starting to become a better person, and starting to "hate much less" yuuko, and help the couple, in amnesia her role was big changed, on manga on start she was much more about make teiich forget yuuko too and only helped in the end after seeing how teiich was really determined to get yuuko's memories back, but in anime she supported him from the start to get back to yuuko even saying that she admired Yuuko, but was removed from the end where her role to "push teiich to yuuko" was leaked to the "magic stumbling" of teiich.
momoe: well almost mangas and anime the sames
manga:the fun character doing almost of the funny puns, get only few "love" moments with teiich(he not launch with her all the times like in anime, most of the times teiich lunch with yuuko)
anime: on anime she is much more fun than manga, and have much more "lunch" moments with teiich
yuuko's sister/kirie's grandmother: until now only appear on manga and looks like have a big role on yuukos death(no spoils here)
other "yuuko": the girl with the same name of yuuko on manga appear 2 times and her role on the story was a few more important than anime
the school nurse: another character who only appear on manga