Mugen, there is some info on any of my tools source code, in Xv2SaveFile.h/cpp.

Anyway, I'll put it here for documentation purposes. It is mostly related with things that are used by Cycit/Cac2X2m.

Offset 0 - Signature (#SAV)
Offset 8 - Steam id 64 xored with the value 0x7468656265636F6E
Offset 0x46: If the user didn't import a hero from XV1, this value holds the XV1 hero preset. 0 -> male human, 1 -> female human, 2 -> male saiyan, and so on until all possible xv1 hero presets (which are in the .pal file of the game).

If the player imported a hero from xv1, I have no idea about this value or how the XV1 hero is saved.

The first CaC structure begins at 0x1E830. The next one begins 0xC6C8 bytes later. The next one another 0xC6C8 bytes later and so on until you have the eight cacs.

The CaC structure (only things I looked for Cycit/Cac2X2m, this structure continues further down, but I haven't researched that).
Offset relative to the start of the structure.

typedef struct
{
   uint8_t unk_00[0x14]; // 0 -> starts at 0 in a new chara
   uint32_t race; // 0x14
   uint32_t voice; // 0x18
   uint32_t body_shape; // 0x1C
   uint32_t unk_20;
   uint16_t skin_color1; // 0x24
   uint16_t skin_color2; // 0x26
   uint16_t skin_color3; // 0x28
   uint16_t skin_color4; // 0x2A
   uint16_t hair_color; // 0x2C
   uint16_t eye_color; // 0x2E
   uint16_t makeup_color1; // 0x30
   uint16_t makeup_color2; // 0x32
   uint16_t makeup_color3; // 0x34
   uint8_t unk_36[0xE];
   char name[64]; // 0x44 Ascii... or utf8, we don't know for sure
   uint32_t face_base; // 0x84
   uint32_t face_forehead; // 0x88
   uint32_t eyes; // 0x8C (
   uint32_t nose; // 0x90
   uint32_t ears; // 0x94
   uint32_t hair; // 0x98
   uint32_t unk_9C[4]; // these maybe regen rates or something like that
   uint32_t level; // 0xAC
   uint8_t unk_B0[4];
   uint32_t attribute_points; // 0xB4
   uint32_t hea; // 0xB8
   uint32_t ki; // 0xBC
   uint32_t atk; // 0xC0
   uint32_t str; // 0xC4
   uint32_t bla; // 0xC8
   uint32_t stm; // 0xCC
   XV2CacSet sets[XV2_NUM_PRESETS]; // 0xD0   0 is current clothing, 1-7 are presets
} PACKED XV2Cac;

(XV2_NUM_PRESETS = 8)
Where X2CacSet is:


typedef struct
{
   uint32_t top; // 0
   uint32_t bottom; // 4
   uint32_t gloves; // 8
   uint32_t shoes; // 0xC
   uint32_t accesory; // 0x10
   uint32_t talisman; // 0x14
   uint32_t qq; // 0x18
   uint16_t top_color1; // 0x1C
   uint16_t top_color2; // 0x1E
   uint16_t top_color3; // 0x20
   uint16_t top_color4; // 0x22
   uint16_t bottom_color1; // 0x24
   uint16_t bottom_color2; // 0x26
   uint16_t bottom_color3; // 0x28
   uint16_t bottom_color4; // 0x2A
   uint16_t gloves_color1; // 0x2C
   uint16_t gloves_color2; // 0x2E
   uint16_t gloves_color3; // 0x30
   uint16_t gloves_color4; // 0x32
   uint16_t shoes_color1; // 0x34
   uint16_t shoes_color2; // 0x36
   uint16_t shoes_color3; // 0x38
   uint16_t shoes_color4; // 0x3A
   // (Note: skill matches the id1 in cus)
   uint32_t super_skills[4]; // 0x3C
   uint32_t ult_skills[2]; // 0x4C
   uint32_t evasive_skill; // 0x54
   uint32_t blast_skill; // 0x58 set to 0xFFFFFFFF (cac uses blast from talisman)
   uint32_t awaken_skill; // 0x5C
} XV2CacSet;

The non-imported XV1 hero is only stored as that number at offset 0x46, which acts as an index to the npc presets of type heroe. In fact, those presets can be modified with latest version of Cycit without the need of touching the save. (previous version of Cycit had a small bug that corrrupted those specific entries in the .pal file)