/d/GitHub/Cataclysm-DDA/src/character.h should add these lines:
#include <memory>               // for __shared_ptr, __weak_ptr
#include "body_part_set.h"      // for body_part_set
#include "compatibility.h"      // for list_is_noexcept, map_is_noexcept
#include "inventory.h"          // for inventory
#include "pocket_type.h"        // for pocket_type, pocket_type::CONTAINER
#include "safe_reference.h"     // for safe_reference
#include "subbodypart.h"        // for sub_bodypart_id, side, side::BOTH
#include "units.h"              // for energy, mass, volume, temperature_delta
class activity_actor;
class item_pocket;
class profession;
namespace catacurses { class window; }
struct city;
struct field_immunity_data;
struct mutation_category_trait;
struct projectile;

/d/GitHub/Cataclysm-DDA/src/character.h should remove these lines:
- #include <iosfwd>  // lines 10-10
- #include <new>  // lines 14-14
- #include "city.h"  // lines 33-33
- #include "item_pocket.h"  // lines 44-44
- #include "memory_fast.h"  // lines 46-46
- #include "units_fwd.h"  // lines 56-56
- class Character;  // lines 61-61
- class inventory;  // lines 73-73
- class npc;  // lines 79-79
- struct needs_rates;  // lines 97-97
- struct points_left;  // lines 99-99

The full include-list for /d/GitHub/Cataclysm-DDA/src/character.h:
#include <algorithm>            // for max
#include <bitset>               // for bitset
#include <climits>              // for INT_MAX, INT_MIN
#include <cstdint>              // for int64_t, uint64_t
#include <functional>           // for function, reference_wrapper, cref, hash
#include <limits>               // for numeric_limits
#include <list>                 // for list, operator!=, _List_iterator, lis...
#include <map>                  // for map
#include <memory>               // for __shared_ptr, __weak_ptr
#include <optional>             // for optional, nullopt
#include <queue>                // for priority_queue
#include <set>                  // for set
#include <string>               // for string, operator==, allocator, __allo...
#include <type_traits>          // for integral_constant
#include <unordered_map>        // for unordered_map
#include <unordered_set>        // for unordered_set
#include <utility>              // for pair, forward
#include <vector>               // for vector
#include "activity_tracker.h"   // for activity_tracker
#include "activity_type.h"      // for activity_id
#include "addiction.h"          // for addiction
#include "body_part_set.h"      // for body_part_set
#include "bodypart.h"           // for bodypart_id, body_part_type, body_par...
#include "calendar.h"           // for time_point, time_duration, operator""...
#include "cata_utility.h"       // for return_true, return_false
#include "character_attire.h"   // for outfit
#include "character_id.h"       // for character_id
#include "compatibility.h"      // for list_is_noexcept, map_is_noexcept
#include "coordinates.h"        // for tripoint_abs_omt, tripoint_bub_ms
#include "craft_command.h"      // for comp_selection, craft_command (ptr only)
#include "creature.h"           // for creature_size, Creature, creature_siz...
#include "damage.h"             // for damage_unit (ptr only), damage_instance
#include "debug.h"              // for debug_filter
#include "enums.h"              // for social_modifiers, game_message_params
#include "flat_set.h"           // for flat_set
#include "game_constants.h"     // for INVENTORY_HANDLING_PENALTY, PICKUP_RANGE
#include "inventory.h"          // for inventory
#include "item.h"               // for item, faction_id, hint_rating, item::...
#include "item_location.h"      // for item_location, item_location::nowhere
#include "magic_enchantment.h"  // for enchant_cache (ptr only), mod
#include "pimpl.h"              // for pimpl
#include "player_activity.h"    // for player_activity
#include "pocket_type.h"        // for pocket_type, pocket_type::CONTAINER
#include "point.h"              // for tripoint, tripoint_min, tripoint_zero
#include "ranged.h"             // for Target_attributes
#include "recipe.h"             // for recipe (ptr only), recipe_filter_flags
#include "ret_val.h"            // for ret_val
#include "safe_reference.h"     // for safe_reference
#include "stomach.h"            // for stomach_contents, nutrients
#include "string_formatter.h"   // for string_format
#include "subbodypart.h"        // for sub_bodypart_id, side, side::BOTH
#include "type_id.h"            // for trait_id, itype_id, skill_id, flag_id
#include "units.h"              // for energy, mass, volume, temperature_delta
#include "visitable.h"          // for read_only_visitable (ptr only), Visit...
#include "weakpoint.h"          // for weakpoint (ptr only), weakpoint_attack
#include "weighted_list.h"      // for weighted_int_list
class JsonObject;  // lines 62-62
class JsonOut;  // lines 63-63
class SkillLevel;  // lines 64-64
class SkillLevelMap;  // lines 65-65
class activity_actor;
class basecamp;  // lines 66-66
class bionic_collection;  // lines 67-67
class character_martial_arts;  // lines 68-68
class dispersion_sources;  // lines 69-69
class effect;  // lines 70-70
class effect_source;  // lines 71-71
class faction;  // lines 72-72
class item_pocket;
class known_magic;  // lines 74-74
class ma_technique;  // lines 75-75
class map;  // lines 76-76
class monster;  // lines 77-77
class nc_color;  // lines 78-78
class player_morale;  // lines 80-80
class profession;
class proficiency_set;  // lines 81-81
class recipe_subset;  // lines 82-82
class spell;  // lines 83-83
class ui_adaptor;  // lines 84-84
class vehicle;  // lines 86-86
class vpart_reference;  // lines 85-85
namespace catacurses { class window; }
struct Character::bionic_fuels;  // lines 3932-3932
struct bionic;  // lines 87-87
struct city;
struct construction;  // lines 88-88
struct dealt_projectile_attack;  // lines 89-89
struct display_proficiency;  // lines 90-90
struct field_immunity_data;
struct islot_comestible;  // lines 92-92
struct item_comp;  // lines 93-93
struct itype;  // lines 94-94
struct mutation_branch;  // lines 95-95
struct mutation_category_trait;
struct mutation_variant;  // lines 96-96
struct pathfinding_settings;  // lines 98-98
struct projectile;
struct requirement_data;  // lines 100-100
struct tool_comp;  // lines 101-101
struct trait_and_var;  // lines 102-102
struct trap;  // lines 103-103
struct w_point;  // lines 104-104
template <typename E> struct enum_traits;  // lines 105-105
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